I recently noticed that AMS charges (from advertising.amazon.com) don’t seem to be in the normal settlement reports. The settlement reports (ie from GET_V2_SETTLEMENT_REPORT_DATA_FLAT_FILE_V2) contain other ad fees, but not the AMS ones.
Why? Or, how do I fix that?
I just found the invoices listed on https://advertising.amazon.com/billing/history - but that’s not part of MWS, and not in a convenient format. But at least it’s better than nothing. Still investigating.