Most Amazon and QuickBooks tools are doing your books
A2X, Synder and Intuit’s own connector all answer the settlement question. We answer a different one.
Search this and almost everything on the first page is an accounting bridge. They take an Amazon settlement, split it into sales, refunds, FBA fees, referral fees and reimbursements, and post the pieces so that the deposit hitting your bank reconciles against your books. If closing the month is what hurts, one of those is what you want and we will not pretend otherwise.
QuickSync is not that. We write each Amazon order into the company file as an invoice and set the quantity on hand for the item, and we do the same for every other shop you connect. The point is that the stock count in QuickBooks stops being a number someone types in once a quarter and starts following what actually sold.
These are complementary rather than competing, and running both is normal. An accounting bridge writes summaries and fees; we write invoices and quantities. They touch different records, so neither overwrites the other’s work.