Client Documents

What to upload for your return.

Use the checklist below to gather your documents. If a section doesn't apply to you, simply skip it.

Upload documents to the secure link sent in your email.

You don't need a perfect package.

Upload what you have. Once we've reviewed your documents, we'll reach out for anything additional we need — so there's no need to guess what's missing. If you're unsure whether something is relevant or deductible, upload it anyway and let us evaluate it.

Please provide the following for your individual income tax return. Upload everything that applies to you.

01Personal & Filing Information
  • Full legal name, address, date of birth and SSN/ITIN
  • Spouse's information, if married
  • Dependents: name, date of birth, SSN/ITIN, relationship
  • Marital status as of December 31, 2025
  • Expected filing status (Single, MFJ, MFS, Head of Household, Qualifying Surviving Spouse)
  • Whether you or your spouse lived outside the U.S. in 2025
  • Dates you were physically present in the U.S. in 2025
  • Immigration/residency information, if applicable
  • Prior-year federal and state returns
  • Any IRS or state notices received in 2025 or 2026

Physical-presence dates matter most if you are a non-U.S. citizen, green-card holder, visa holder, or recently moved to or from the U.S.

02Employment Income
  • W-2s from every employer
  • Corrected W-2s (W-2C), if applicable
  • Severance statements
  • Bonuses and deferred compensation
  • Employer stock compensation documents
  • RSU / ESPP / stock option documents
  • Form 3921 – ISO exercise
  • Form 3922 – ESPP stock transfer
  • Other employment-related compensation
03Interest, Dividends & Bank Income

Statements from all banks and financial institutions, including:

  • 1099-INT – interest income
  • 1099-DIV – dividends and capital-gain distributions
  • 1099-OID – original issue discount
  • Savings / checking account interest
  • CDs
  • Treasury bills, notes and bonds
  • Municipal bond interest
  • Money-market income
  • Credit-union interest

Small amounts still count, even if you didn't receive a tax form.

04Brokerage, Stocks, Bonds & Investments

For every brokerage / investment account:

  • Complete 1099-B
  • Consolidated 1099 statements
  • Stock, bond, mutual fund and ETF transactions
  • Options transactions
  • Restricted stock, RSU and ESPP sales
  • Short-term and long-term gains/losses
  • Capital-loss carryforward from prior years
  • Cost-basis information
  • Wash-sale information

If you traded frequently, send the complete annual brokerage statement or transaction report — not just the summary page.

05Cryptocurrency / Digital Assets
  • Crypto exchange statements
  • 1099-DA, if issued
  • 1099-B or other transaction reports
  • Purchases and sales
  • Crypto-to-crypto exchanges
  • Staking and mining income
  • Airdrops and rewards
  • Digital-asset payments received
  • Transfers between wallets/exchanges
  • Cost-basis information

Please also identify any transactions that occurred outside U.S. exchanges.

06Retirement Accounts
  • 1099-R – IRA / 401(k) / 403(b) / pension distributions
  • Traditional and Roth IRA contributions
  • Roth conversions
  • SEP and SIMPLE IRA contributions
  • 401(k) / 403(b) information
  • Form 5498, if available
  • Rollover documentation
  • Any excess contribution or corrective distribution documents
07HSA / FSA / Medical
  • Form 1099-SA and Form 5498-SA
  • HSA contribution and distribution information
  • Employer HSA contributions
  • FSA contributions / distributions
  • Medical insurance premiums, if potentially deductible
  • Significant out-of-pocket medical expenses
  • Long-term care expenses, if applicable
08Health Insurance
  • Form 1095-A – Marketplace insurance
  • Health insurance premium information
  • Premium tax credit information
  • Other health coverage information where relevant
09Rental Real Estate

For each rental property:

Property information

  • Property address
  • Date purchased and purchase price
  • Land / building allocation, if known
  • Date placed in service
  • Ownership percentage
  • Mortgage information
  • Prior-year depreciation schedule

Rental income

  • Rent received
  • 1099-MISC / 1099-NEC, if applicable
  • Property management statements
  • Airbnb / VRBO / other platform statements
  • Security deposits retained
  • Other rental income

Rental expenses

  • Mortgage interest and property taxes
  • Insurance and HOA
  • Property management
  • Repairs and maintenance
  • Utilities, advertising, cleaning, supplies
  • Legal / accounting
  • Travel / mileage related to the rental
  • Major improvements / capital expenditures
  • Depreciation information

The annual property-management statement or an income-and-expense summary is the most helpful single document for each property.

10Business / Self-Employment Income

If you own or operate a business, provide this for each business or entity. (Owners of a separate entity, see the Business tab as well.)

Income

  • 1099-NEC, 1099-MISC, 1099-K
  • Customer payments
  • Stripe / PayPal / Square statements
  • Cash and check payments
  • Other business revenue
  • Accounts receivable, if relevant

Expenses (totals and supporting records)

  • Advertising / marketing
  • Software / subscriptions
  • Office expenses
  • Professional, legal and accounting fees
  • Insurance and business licenses
  • Telephone / internet
  • Rent / coworking
  • Contractor payments and payroll
  • Travel and meals
  • Education / training
  • Supplies, equipment, technology purchases
  • Interest and bank / merchant fees
  • Other ordinary and necessary expenses

Vehicle used for business

  • Make / model and date placed in service
  • Total, business and commuting/personal miles
  • Mileage log
  • Purchase or lease information
  • Interest, fuel, insurance, repairs, registration

Business income must be reported even if you didn't receive a 1099. The 2025 IRS standard business mileage rate is 70 cents per mile.

11Partnerships, S Corporations & K-1s
  • Schedule K-1 from every partnership
  • Schedule K-1 from every S corporation
  • Trust / estate K-1
  • Prior-year K-1s, if relevant
  • Capital contribution information
  • Distributions received
  • Ownership changes
  • Sale / redemption of partnership or S-corp interests
  • Basis information
  • Guaranteed payments
  • Entity tax statements

Please provide K-1s even if the entity did not distribute cash to you.

12Private Investments / Venture Capital / Private Equity
  • K-1s and 1099s
  • Subscription agreements
  • Capital contribution and distribution statements
  • Investment sale / redemption documents
  • Capital account statements
  • Loss carryforward information
  • Section 1202 / QSBS documentation, if applicable
  • 83(b) election documentation
  • SAFE / convertible-note investment information
13Real Estate Purchases & Sales

For any real estate purchased or sold during 2025:

  • Closing / settlement statement
  • Form 1099-S
  • Purchase and sale agreements
  • Original purchase closing statement
  • Capital improvement records
  • Mortgage payoff information
  • Selling expenses and commissions
  • Property tax allocation
  • 1031 exchange documentation
  • Exchange intermediary statements
14Home / Mortgage / Property Taxes
  • Form 1098 – mortgage interest
  • Property tax statements
  • Mortgage refinancing documents
  • Home purchase and sale documents
  • Points paid
  • Home improvement records
  • Energy-efficiency improvement records
  • Electric vehicle / home charging documentation
15Charitable Contributions
  • Cash donations
  • Non-cash donations
  • Donor-advised fund contributions
  • Foundation contributions
  • Stock donations
  • Qualified charitable distributions
  • Vehicle / property donations
  • Written acknowledgments for significant donations

For non-cash donations, include descriptions and valuations where available.

16Education
  • Form 1098-T and tuition statements
  • Qualified education expenses
  • Student loan interest / Form 1098-E
  • Scholarships and grants
  • 529 distributions / Form 1099-Q
  • Education-related employer benefits
17Childcare / Dependents
  • Provider name and address
  • Provider Tax ID / SSN
  • Amount paid
  • Dates of care
  • Form 2441-related information
  • Other dependent-related expenses
18Major Deductible Expenses

Documentation for any significant expense that may have tax implications:

  • Medical and charitable
  • Mortgage interest and property taxes
  • Student loan interest and education
  • Business and investment expenses
  • Professional and legal expenses
  • Tax preparation / accounting fees
  • Business travel and home office
  • Energy improvements
  • Qualified vehicle purchases
  • Other unusually large expenses

If you're unsure whether an expense is deductible, upload it anyway and let us evaluate it.

19Estimated Tax Payments & Prior-Year Credits
  • Federal estimated tax payments
  • State estimated tax payments
  • Extension payments
  • Prior-year overpayment applied to 2025
  • Foreign tax payments
  • Other tax payments
  • IRS / state payment confirmations
20Foreign Income & International Information
  • Foreign employment, business and rental income
  • Foreign bank and brokerage accounts
  • Foreign financial accounts and highest balances
  • Foreign pensions and trusts
  • Foreign corporations and partnerships
  • Other foreign investments
  • Foreign gifts / inheritances
  • Foreign taxes paid
  • Form 1042-S and other foreign tax documents

Please tell us about foreign accounts and assets even if you didn't receive a tax form — additional U.S. information-reporting requirements may apply.

21Major Life Events During 2025

Let us know if any of these occurred:

  • Marriage, divorce or separation
  • Birth / adoption of a child
  • Death of a spouse or dependent
  • Move to another state
  • Move into or out of the U.S.
  • Started, closed or sold a business
  • Purchased, sold or refinanced real estate
  • Started renting a property
  • Sold investments
  • Received an inheritance or large gift
  • Exercised stock options
  • Started receiving retirement income
  • Significant change in employment
  • Received a large settlement
  • Bankruptcy or significant debt cancellation
22Prior-Year Tax Return

Your complete 2024 federal and state returns, including:

  • Form 1040 and all schedules
  • All supporting forms
  • Schedules C, E and D
  • K-1s
  • Depreciation schedules
  • Capital-loss carryforwards
  • Passive-loss carryforwards
  • AMT and NOL information
  • State returns

Especially important for carryforwards and items that continue from prior years.

23IRS / State Correspondence
  • IRS and state tax notices
  • Estimated tax notices
  • CP notices
  • Audit correspondence
  • Penalty and balance-due notices
  • Refund notices
  • Amended-return correspondence
  • Prior tax controversy correspondence
24Taxpayer Questionnaire

Please also tell us:

  • Filing status: Single / MFJ / MFS / HOH / QSS
  • Spouse: name, SSN/ITIN, date of birth, income documents
  • Dependents: names, DOB, SSN/ITIN, relationship
  • Were you a U.S. citizen, green-card holder or resident alien in 2025? If not, your visa/status
  • Date entered / departed the U.S., and days physically present in 2025
  • States lived or worked in during 2025, with dates
  • Businesses owned: entity name, type, ownership %
  • Rental properties: address, ownership %
  • Investment accounts: brokerage / fund names
  • Foreign accounts or assets: yes / no
  • Major 2025 transactions: real estate, business sale/purchase, stock/options, private investment, crypto, inheritance/gift, other

Final completeness check

Before you submit, confirm you've covered the following (for your own reference — this isn't submitted anywhere).

Please provide the following for your 2025 business tax return and year-end books — whether you operate as a sole proprietorship / single-member LLC, partnership, S corporation, or C corporation. Upload everything that applies to your entity.

01Entity & Ownership Information
  • Legal entity name, EIN and entity type
  • State and date of formation
  • Articles of organization / incorporation
  • Operating agreement, bylaws or partnership agreement
  • Owner / shareholder / member names, addresses and ownership percentages
  • Owner SSNs/ITINs (via the secure portal only)
  • Any change in ownership during 2025
  • Tax election documents (e.g., S-corp election, Form 2553)
  • States where the business operates or has employees, customers or property
  • Prior-year federal and state business returns
02Books & Financial Statements
  • Year-end Profit & Loss statement
  • Year-end Balance Sheet
  • Trial balance and general ledger
  • Access to your accounting system (QuickBooks, Xero, etc.) or an export
  • Bank reconciliations as of December 31, 2025
  • Notes on any unusual or one-time entries

If we handle your bookkeeping, we'll pull most of this ourselves — just confirm access.

03Bank & Credit Card Statements
  • Monthly statements for every business bank account (including closed accounts)
  • Monthly statements for every business credit card
  • Savings, money-market and CD accounts
  • December 2025 and January 2026 statements (for year-end cut-off)
  • Payment-processor statements (Stripe, PayPal, Square)
  • Statements for any personal accounts used for business
04Income & Revenue
  • 1099-NEC, 1099-MISC and 1099-K received
  • Sales reports and invoices
  • Customer payments (cash, check, electronic)
  • Accounts receivable aging at year-end
  • Deferred revenue / customer deposits
  • Other income (interest, grants, refunds, asset sales)

Business income must be reported even if you didn't receive a 1099.

05Expenses
  • Advertising / marketing
  • Software / subscriptions
  • Office and supplies
  • Professional, legal and accounting fees
  • Insurance and business licenses
  • Telephone / internet
  • Rent / coworking / lease agreements
  • Contractor payments
  • Travel and meals
  • Education / training
  • Interest and bank / merchant fees
  • Other ordinary and necessary expenses
06Payroll & Contractors

Payroll

  • Payroll provider year-end reports
  • Forms 941 (all four quarters) and 940
  • W-2s and W-3
  • State payroll and unemployment filings
  • Owner / officer compensation details
  • Employee benefit and withholding summaries

Independent contractors

  • List of contractors paid, with amounts
  • Signed W-9s
  • 1099-NEC filings issued
07Fixed Assets & Depreciation
  • Prior-year depreciation schedule
  • Equipment, vehicle, furniture and technology purchases in 2025 (invoices, dates placed in service)
  • Assets sold, traded or disposed of, with sale documents
  • Leasehold improvements and build-outs
  • Cost segregation or other depreciation studies
  • Vehicle details: make / model, in-service date, business vs. personal miles, mileage log
08Inventory
  • Beginning and ending inventory counts / values
  • Inventory valuation method
  • Purchases and cost-of-goods-sold detail
  • Write-downs or obsolete inventory

Skip this section if your business doesn't hold inventory.

09Loans & Debt
  • Loan statements and year-end balances
  • Form 1098 / interest statements
  • Lines of credit
  • Loan agreements for new borrowing in 2025
  • SBA, PPP or EIDL documentation
  • Loans to or from owners or related parties
  • Any debt forgiven or cancelled
10Owner, Partner & Shareholder Activity
  • Capital contributions made in 2025
  • Distributions / draws taken
  • Guaranteed payments to partners
  • Basis and capital-account information
  • Owner health insurance premiums paid by the business
  • Personal expenses paid through the business
  • Buy-sell, redemption or ownership-transfer documents
11Retirement Plans & Benefits
  • 401(k), Solo 401(k), SEP or SIMPLE plan documents
  • Employer and employee contribution summaries
  • Plan-provider statements and annual filings (e.g., Form 5500)
  • Group health insurance premium statements
  • HSA / FSA / other benefit program records
12Sales Tax & State / Local Filings
  • Sales and use tax returns filed in 2025
  • State annual reports and franchise tax filings
  • Business license and registration renewals
  • Local business tax filings
  • Any state or local notices received
13Business Real Estate
  • Closing statements for properties bought or sold
  • Form 1099-S
  • Rental income and expense summaries
  • Property tax and mortgage interest statements
  • Capital improvement records
  • 1031 exchange documentation
  • Prior-year depreciation schedules
14Business Sales, Acquisitions & Restructuring
  • Purchase / sale agreements for any business or division
  • Asset allocation schedules
  • Mergers, conversions or entity changes
  • New subsidiaries or affiliates formed
  • Dissolutions or wind-downs
  • Intellectual-property transfers or licensing deals
15Investments Held by the Business
  • Brokerage statements and 1099s
  • Investments in other entities, with K-1s received
  • Cryptocurrency / digital-asset activity
  • Section 1202 / QSBS documentation, if applicable
16Foreign Activity & Ownership
  • Foreign owners, subsidiaries or affiliates
  • Foreign bank and financial accounts
  • Foreign customers, vendors or contractors paid
  • Foreign taxes paid
  • Transactions with related foreign parties

Please tell us about any foreign activity even if you didn't receive a tax form — additional U.S. information-reporting requirements may apply.

17Credits & Incentives
  • Research and development activity (projects, staffing, supplies)
  • Energy-efficiency or clean-energy improvements
  • Hiring of employees from targeted groups
  • State or local incentives and grants
  • Any prior credit studies or carryforwards

Not sure if you qualify? Just describe what you do — we'll let you know if it's worth a closer look.

18Estimated Taxes & Prior-Year Items
  • Federal and state estimated tax payments
  • Extension payments
  • Prior-year overpayments applied to 2025
  • Complete 2024 federal and state business returns, with all schedules and statements
  • Depreciation, NOL and credit carryforward schedules
  • Partnership / S-corp basis schedules
19IRS / State Correspondence
  • IRS and state notices received in 2025 or 2026
  • Payroll or sales-tax agency notices
  • Audit correspondence
  • Penalty and balance-due notices
  • Amended-return correspondence
20Major Business Events During 2025

Let us know if any of these occurred:

  • Business started, closed or sold
  • New owners or partners added or removed
  • Entity type or tax election changed
  • Moved or expanded into a new state
  • Significant hiring or layoffs
  • Major equipment, real estate or vehicle purchases
  • New financing or investor funding
  • Large one-time income or expense
  • Legal settlement or dispute
  • Bankruptcy or debt cancellation

Final completeness check

Before you submit, confirm you've covered the following (for your own reference — this isn't submitted anywhere).

Please provide the following for your startup’s tax return and books — whether you’re pre-revenue, bootstrapped or venture-funded. Upload everything that applies; skip what doesn’t.

01Company Formation & Founders
  • Legal company name, EIN and entity type (LLC, C-corp, etc.)
  • State and date of incorporation / formation
  • Certificate of incorporation or articles of organization
  • Bylaws or operating agreement
  • Founder names, addresses and ownership percentages
  • Founder SSNs/ITINs (via the secure link only)
  • Tax elections filed (e.g., S-corp election, Form 2553)
  • States where the company is registered or operates
  • Any entity conversion, e.g., LLC to C-corp, or reincorporation
02Equity & Cap Table
  • Current cap table (fully diluted)
  • Stock purchase agreements and founder stock issuances
  • 83(b) elections, with proof of timely filing
  • Vesting schedules and any acceleration terms
  • Stock option plan and option grants
  • 409A valuation reports
  • Stock issued for services or IP
  • Share repurchases or cancellations
  • Section 1202 / QSBS supporting documents, if applicable

If you filed an 83(b) election, please send the stamped copy or mailing receipt — it’s easy to lose and hard to replace.

03Funding & Investor Documents
  • SAFEs and convertible notes (signed agreements, amounts, dates)
  • Priced-round documents: term sheet, stock purchase agreement, investor rights agreements
  • Closing statements and wire confirmations
  • Investor names and amounts invested
  • Grants received (federal, state, local)
  • Crowdfunding or venture debt documents
  • Founder loans or capital contributions to the company
04Books & Financial Statements
  • Year-end Profit & Loss statement
  • Year-end Balance Sheet
  • Trial balance and general ledger
  • Access to your accounting system (QuickBooks, Xero, etc.) or an export
  • Burn-rate and runway summary, if you track one
  • Notes on any unusual or one-time entries

If we handle your bookkeeping, we’ll pull most of this ourselves — just confirm access.

05Bank, Credit Card & Payment Accounts
  • Monthly statements for every business bank account (including closed accounts)
  • Monthly statements for every business credit card
  • Stripe, PayPal, Square or other payment-processor statements
  • Corporate card or expense-platform reports (Brex, Ramp, Mercury, etc.)
  • December and January statements for year-end cut-off
  • Any personal accounts or cards used for company expenses
06Revenue & Customers
  • 1099-K, 1099-NEC and 1099-MISC received
  • Invoices and sales reports
  • Subscription / recurring revenue reports
  • Deferred revenue and customer deposits
  • Accounts receivable at year-end
  • Pre-revenue? Just let us know — nothing needed here
07Expenses
  • Software and subscriptions (cloud, hosting, SaaS tools)
  • Advertising / marketing
  • Legal fees, including incorporation and financing costs
  • Accounting and professional fees
  • Insurance and licenses
  • Rent, coworking and lease agreements
  • Travel and meals
  • Equipment and technology purchases
  • Interest and bank / merchant fees
  • Reimbursements owed to founders or employees
08Payroll, Contractors & Founder Pay
  • Payroll provider reports (Gusto, Rippling, etc.)
  • Forms 941 and 940, W-2s and W-3
  • State payroll and unemployment filings
  • Founder salary or guaranteed payments
  • List of contractors paid, with amounts, signed W-9s and 1099-NEC filings
  • Offshore or international contractors and employees
  • Employee benefit and health insurance records
09Research & Development
  • Description of what you’re building and who worked on it
  • Wages and time allocation for engineers and product staff
  • Contractor and outsourced development costs
  • Cloud, hosting and supply costs tied to development
  • Prior-year R&D credit claims or carryforwards
  • Software development costs capitalized or expensed in your books

Early-stage companies often qualify for R&D tax credits. Share what your team works on and we’ll tell you whether it’s worth a closer look.

10Intellectual Property
  • Founder and employee IP assignment agreements
  • Patent applications and filing costs
  • Trademark and domain registrations
  • IP licensed in or out
  • IP purchased or sold
11Loans & Debt
  • Loan and line-of-credit statements
  • Venture debt or equipment financing agreements
  • SBA, PPP or EIDL documentation
  • Founder or shareholder loans
  • Any debt forgiven or converted to equity
12Fixed Assets
  • Equipment, computers and furniture purchases (invoices and dates)
  • Leasehold improvements
  • Assets sold or disposed of
  • Prior-year depreciation schedule
13State & Registration Filings
  • State annual reports and franchise tax filings (e.g., Delaware)
  • Foreign-qualification filings in other states
  • Registered agent information
  • Sales and use tax registrations and returns
  • Business licenses and local filings
14International & Foreign Ownership
  • Foreign founders, investors or shareholders
  • Foreign subsidiaries or affiliates
  • Foreign bank accounts
  • Payments to or from foreign parties
  • Foreign taxes paid

Please tell us about any foreign activity even if you didn’t receive a tax form — additional U.S. information-reporting requirements may apply.

15Prior-Year Returns & Estimated Taxes
  • Federal and state returns filed to date (including any Form 1120, 1120-S or 1065)
  • Federal and state estimated tax payments
  • Extension payments
  • NOL and credit carryforward schedules
  • Any prior-year filings still outstanding
16IRS / State Correspondence
  • IRS and state tax notices
  • Payroll or sales-tax agency notices
  • Late-filing or penalty notices
  • Delaware or other state franchise tax notices
17Major Events During the Year
  • Company formed, converted or reincorporated
  • Funding round closed, SAFE or note issued
  • Founders or key team members added or departed
  • First hire, or contractors converted to employees
  • Acquisition offer, acquisition or merger
  • Pivot, new product launch or new market
  • Company wound down or dissolved

Final completeness check

Before you submit, confirm you’ve covered the following (for your own reference — this isn’t submitted anywhere).

Upload even if you're unsure. It's better for us to review a document and decide how it's treated than to leave out something potentially relevant. After our review, we'll contact you for any additional information we need.

Never send passwords, bank login credentials or other account-access credentials — by email, in the portal, or otherwise.

Questions about what to upload?

Email us at info@kuberaadvisorygroup.com and your relationship manager will help.

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