What documents does a CPA need for small business taxes?

Prior-year return, P&L and balance sheet, bank statements, payroll reports, 1099s issued and received, asset purchase records, mileage logs, and estimated tax payment confirmations.

When should I send documents to my CPA?

January–February for calendar-year filers. March crunch slows turnaround and increases error risk. Extensions buy time to file, not to pay.

Do LLCs and S-corps need different documents?

S-corps need shareholder basis, reasonable compensation analysis, and Form 1120-S inputs. LLCs may need partner K-1 support and self-employment tax calculations.

What if I am missing receipts?

Bank and credit card statements help reconstruct expenses but do not replace documentation for large or unusual deductions. Reconstruct now rather than at audit time.

Small Business Tax Document Checklist for Your CPA (2026)

July 1, 2026 · Guide · 1 min read

Showing up to your CPA with a shoebox costs you money in billable hours. This checklist organizes what to deliver — and when — for 2026 filing season.

Core Financial Package

Profit & loss and balance sheet (Jan–Dec)
Business bank and credit card statements
Payroll summaries and W-2/1099 filings
Sales tax returns if applicable

Entity-Specific Items

Sole prop/LLC: mileage log, home office calculation
S-corp: officer compensation documentation, distribution records
Partnership: capital account changes, K-1 drafts

Find a CPA near you or browse by city. See also quarterly estimated taxes for self-employed.

Frequently Asked Questions

What documents does a CPA need for small business taxes?: Prior-year return, P&L and balance sheet, bank statements, payroll reports, 1099s issued and received, asset purchase records, mileage logs, and estimated tax payment confirmations.
When should I send documents to my CPA?: January–February for calendar-year filers. March crunch slows turnaround and increases error risk. Extensions buy time to file, not to pay.
Do LLCs and S-corps need different documents?: S-corps need shareholder basis, reasonable compensation analysis, and Form 1120-S inputs. LLCs may need partner K-1 support and self-employment tax calculations.
What if I am missing receipts?: Bank and credit card statements help reconstruct expenses but do not replace documentation for large or unusual deductions. Reconstruct now rather than at audit time.