FastSpring

Posts your FastSpring sales to the ledger as one balanced journal entry per month: revenue, FastSpring's fees, refunds, and a receivable from FastSpring that clears when it pays out. Tax FastSpring collects as merchant of record never reaches your books. Nothing posts until an admin presses Post.

It works on the same live ledger the rest of finance uses, so the work happens where the numbers already are instead of in a side system somebody has to reconcile later.