It usually means your return didn’t reconcile with the gross the IRS has on your 1099-K — even if you don’t actually owe more. TaxMatch builds the documented worksheet that explains the gap, line by line.
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An automated mismatch notice — the IRS compared your return to the 1099-K a processor filed and they don’t line up. It proposes a change and gives you a short window to respond.
Your 1099-K reports gross volume: refunds, chargebacks, fees, and sales tax are all baked in. Your real income is lower — but without a reconciliation on file, the system can’t see why.
A clear, documented worksheet mapping the 1099-K gross to your actual income, adjustment by adjustment. That is exactly what TaxMatch generates.
Connect Shopify Payments, PayPal, and Stripe (or import a CSV). TaxMatch subtracts every documented adjustment across all of them and produces a PDF/CSV worksheet you can keep on file or hand to your CPA.
TaxMatch produces a reconciliation worksheet for you and your tax professional. It is not tax or legal advice and does not represent you before the IRS.