Tax season is stressful enough without discovering that a critical business document has expired mid-filing. Every year, thousands of businesses face delays, penalties, and rejected filings because they overlooked a lapsed license, an outdated W-9, or an expired certification. The fix: verify your documents before tax season hits, not during it.
Tip: Start your document review at least 60 days before your filing deadline. This gives you time to renew anything that has lapsed without rushing.
Business Licenses and Registrations
General Business License
Your city or county business license is the foundation of your legal operation. Most jurisdictions require annual renewal, and many set renewal dates in Q1 -- right in the middle of tax prep.
Verify:
- Current license is valid through your fiscal year end
- Business name and address match your tax return exactly
- Any DBA registrations are also current
- State-level business registration is renewed if applicable
Professional and Occupational Licenses
If your business requires specialized licensing, these must be active for the entire tax period you are filing for. An expired license can call into question whether income earned during the lapse was legally generated.
- State professional license renewal dates
- Continuing education requirements affecting license validity
- Board certifications tied to your practice
- Provisional or temporary licenses with time limits
W-9 Collection from Contractors
If you paid any contractor $600 or more during the tax year, you need a current W-9 on file to issue a 1099-NEC.
What Makes a W-9 "Current"
- The contractor's legal name and entity type have not changed
- Their TIN is still valid
- Their address matches what you have on file
- They have not changed their tax classification
Tip: Send a batch email to all contractors in January requesting updated W-9s. Set a two-week deadline and follow up with non-responders.
Consequences of Missing W-9s
- B-notice penalties from the IRS for TIN mismatches
- Backup withholding requirements at 24% on future payments
- Penalties of $50 to $280 per form for late or incorrect 1099 filings
Accountant and Tax Preparer Certifications
Verify your preparer's credentials before handing over your financials:
- CPA license: Must be active in their state of practice
- PTIN: Required for all paid preparers, renewed annually by December 31
- Enrolled Agent status: Must be current with the IRS
- E&O insurance: Confirm your accountant carries current coverage
Red flags: A preparer who refuses to provide their PTIN, an expired CPA license on the state board lookup, or a preparer who will not sign the return.
Sales Tax Permits and Resale Certificates
If your business collects sales tax, your permit must be current. An expired permit means you may have been collecting sales tax without legal authority -- a serious compliance issue.
- State sales tax permit or seller's permit
- Resale certificates from tax-exempt customers (refresh every 3-5 years)
- Exemption certificates for inventory or raw material purchases
- Multi-state registrations if you sell across state lines
Tip: If you have expanded into new states through online sales, check whether you have triggered economic nexus thresholds requiring sales tax registration.
Employer Identification and Payroll Documents
Your EIN does not expire, but confirm the EIN on your tax documents matches what the IRS has on file -- mismatches happen more often than expected after restructuring.
Payroll tax registrations to verify:
- State unemployment insurance account is active with current rate
- State withholding tax registration for each state with employees
- Workers' compensation covers the full tax year
- State disability insurance registrations (required in CA, HI, NJ, NY, RI, PR)
Insurance Policies That Affect Your Return
Several policies are both deductible and required for compliance. Verify these are current:
- General liability -- deductible only if active during the period claimed
- Professional liability (E&O) -- same principle
- Commercial property insurance -- policy must be in force to deduct premiums
- Health insurance -- verify coverage dates for accurate reporting
- Key person insurance -- premiums generally not deductible, but documentation matters
Pre-Tax Document Checklist
Work through this before your first meeting with your accountant:
- Business license -- current and matching your return
- Professional licenses -- active for the full tax year
- W-9s from all contractors -- collected and verified
- 1099 data -- ready to file by January 31
- Sales tax permits -- renewed and compliant
- EIN confirmation letter -- accessible
- Payroll tax registrations -- active in all applicable states
- Workers' comp and liability policies -- current declarations pages
- Accountant credentials -- verified CPA/EA/PTIN
- Prior year return and depreciation schedules -- available for reference
Tip: Create a folder labeled "Tax Season [Year]" and collect copies of every document on this list. Having everything in one place saves hours of back-and-forth with your accountant.
Do Not Wait for Tax Season to Start
ExpiryKeeper lets you set renewal reminders for every business document on this list, assign team members to handle specific renewals, and get a clear dashboard view of what is current, what is expiring, and what has lapsed. When tax season arrives, you simply pull up your dashboard and confirm everything is green.
The best time to organize your business documents was last year. The second-best time is right now.