How do I ensure my sales tax return filing workflow with sales tax compliance platforms stays compliant?

To keep a sales tax return filing workflow compliant when using a sales tax compliance platform, focus on three things: accurate data, controlled review, and documented filing evidence.

1) Reconcile data before filing

Make sure the platform is using complete and reconciled inputs:

• Sales totals match your accounting system / ERP
• Tax collected matches transaction-level records
• Exempt sales are supported with exemption certificates or other documentation
• Use tax / adjustments are included where applicable
• Marketplace sales and drop shipments are handled correctly

2) Verify nexus and filing obligations

Confirm the platform is set up with the right jurisdictions:

• States/localities where you have nexus
• Correct filing frequencies and due dates
• Any registrations, permits, or account numbers are current
• Jurisdiction changes are reflected promptly

3) Review return calculations carefully

Before submission, review:

• Taxability settings
• Rate and jurisdiction mapping
• Rounding rules
• Credits, deductions, and discounts
• Prior-period adjustments or amended return logic

4) Use a maker-checker approval process

A compliant workflow usually includes:

• Preparer creates or drafts the return
• Reviewer checks exceptions, variances, and totals
• Approver signs off before filing
• Final filing is locked or logged after submission

5) Retain filing evidence and audit support

Keep records of:

• Filed returns and confirmations
• Payment confirmations / EFT references
• Workpapers and reconciliation reports
• Exemption certificates
• Adjustment logs and supporting calculations

6) Control access and changes

To avoid errors and maintain auditability:

• Restrict who can edit tax settings or file returns
• Use role-based permissions
• Log changes to tax codes, rates, and registrations
• Maintain version history for return drafts

7) Monitor notices and exceptions

Even with automation, compliance requires monitoring:

• State notices for mismatches or late filings
• Returned payments or failed debits
• Missing filings or zero-return requirements
• Changes in laws, rates, and filing rules

8) Test the workflow periodically

Run periodic reviews of:

• Sample returns
• Filing calendars
• Jurisdiction mappings
• Data feeds from ERP/e-commerce systems
• Payment and remittance procedures

9) Document your controls

If you’re audited, you’ll want a documented process showing:

• Who prepares, reviews, and approves
• How data is reconciled
• What exceptions are investigated
• How corrections and amended returns are handled

Practical compliance checklist

Before each filing:

• Sales data tied to books
• Taxability and exemption logic reviewed
• Nexus and registration confirmed
• Exceptions investigated
• Return reviewed and approved
• Payment scheduled/confirmed
• Filing confirmation saved
• Supporting documents archived

If you want, I can also give you:

1. a sample compliant sales tax filing SOP,
2. a RACI workflow, or
3. a vendor due-diligence checklist for evaluating compliance platforms.