Tax Document Checklist for CPA Clients [2026]

Clients Google tax document checklist for clients every January - and firms that publish a clear, year-specific list earn trust before the first reminder fires. This 2026 checklist covers individuals, S-corps, rentals, and side-income scenarios CPAs see most often.

Why a published checklist beats a PDF attachment

PDF organizers get saved to Downloads and forgotten. Interactive checklists show progress, accept uploads per line item, and tell clients exactly what is still missing - the same UX pattern behind high completion rates in tax season workflows.

Turn this list into a live template with Infile template builder or duplicate from the accounting library.

2026 individual return checklist

• W-2 forms (all employers)
• 1099-NEC / 1099-MISC (contracting, platforms, royalties)
• 1099-INT and 1099-DIV (banks, brokerages)
• 1098 (mortgage interest) and property tax statements
• 1095-A / 1095-B / 1095-C (health coverage)
• Charitable receipts over $250 (written acknowledgment)
• Childcare provider name, address, and EIN
• Estimated tax payment dates and amounts (federal + state)
• Identity Protection PIN (if issued by IRS)
• Prior-year return copy (new clients)

Side income and gig work add-ons

Clients with Uber, Etsy, or consulting income often omit:

• 1099-K from payment platforms
• Business expense receipts (mileage log, home office)
• Quarterly estimated payment confirmations
• Sales tax reports for product sellers

Conditional logic tip: show gig-economy fields only when clients answer "Yes" to self-employment income - reduces overwhelm for W-2-only filers.

Rental property schedule

• Rental income summary (property management statements)
• Mortgage interest (1098) per property
• Property tax bills
• Insurance premiums
• Repair invoices over your firm's materiality threshold
• Depreciation schedule from prior year

S-corporation and partnership packages

S-corp client deliverables

• Profit & loss and balance sheet (unaudited)
• Payroll summaries and W-3
• Fixed asset additions/disposals
• Shareholder distribution detail
• State withholding accounts

K-1 recipients (individual owners)

Send a shortened checklist that only asks for K-1s from partnerships, S-corps, and trusts - many clients miss these until March.

How to deliver the checklist to clients

1. Publish template before Thanksgiving
2. Send with Template 1 from our email templates guide
3. Enable reminders tied to missing items only
4. Export completed packages to your prep software folder

Extension season variant

Duplicate the April template, pre-check items already received, and highlight only new or updated documents. See extension use case.

Frequently asked questions