Settlements that post themselves, to the penny

Amazon money is orders — what sold, where, with what tax — and settlements — what Amazon actually deposited and what it charged to get there: commission, fulfilment, storage, advertising, and tax on the fees. Books that carry only the first half show a profit you did not make and a clearing account that never empties. SeroBooks posts both, for the same periods.

Orders become invoices; each settlement becomes a journal with every fee itemised. The clearing account rises with sales and falls with payouts — the shape that proves the books are whole.

Every fee description Amazon uses needs an account, and unmapped fees land visibly in the holding account rather than being guessed into an expense. Map them and it empties — and a new balance there later is your earliest warning Amazon started charging something new.

Settlement pulls are read-only until you post, so setup is inspectable before a single entry is written.

The destination province sets the rate, so orders are enriched with their ship-to province before posting — an order with no province cannot be taxed correctly, and the flow enforces the order of operations. Marketplace-collected tax is recorded on both sides so figures net correctly and the return can be explained; genuinely exempt buyers post as zero-rated, not as errors.

File from the by-province, by-tax breakdown here — the shape a return asks for — not from a marketplace report.

This is the work A2X and Webgility charge monthly for, built into the product and verified against a real seller's QuickBooks account-for-account. Each settlement ties to one bank deposit; reconcile every payout and year-end is an afternoon, not a forensic week.

Marketplace accounting stops being a speciality and becomes a screen.