The Filing Season 1099-K Checklist: What to Pull Before You Start

The 1099-K lands, the client forwards it, and the temptation is to plug Box 1a straight into the return and move on. That works fine when the number is right. The checklist below is what to gather before assuming it is.

Before you touch the return

1. The 1099-K itself — every page, not just the summary. Confirm the payer name, the client's TIN, and the box 1a total match what you expect. A second processor account under a slightly different business name is a common, easy-to-miss cause of an incomplete picture.
2. The processor's own transaction history — not the payout report. A payout summary is already netted and batched; it will never tie cleanly to Box 1a. You need the itemized or balance-transaction export, with gross amounts per charge.
3. What the client's books show for the same period. This is a separate question from whether the form matches the processor — a client's books can be off from Stripe's own numbers even when Stripe matches the 1099-K perfectly.
4. Any refunds or chargebacks processed during the year. These belong on Line 2, not netted into Line 1, and not ignored.

The two gaps, kept separate

Treat "does the form match the processor" and "does the processor match the books" as two different questions with two different likely causes. Conflating them into one blended variance makes it harder to tell whether you're looking at a filing problem or a bookkeeping one.

If something doesn't tie out

Don't force it. A gap that gets closed by quietly adjusting Line 1 to match Box 1a — without understanding why they differed — is exactly the kind of thing that surfaces again as a CP2000 notice in the summer. Document the variance, note the likely cause, and resolve it before the return goes out the door.

Once it's clean

A five-minute reconciliation now is what keeps this from becoming a longer conversation with the IRS later. If the client had a monthly close running through the year, this step is mostly a formality — you're confirming twelve months of work, not doing it all at once.