From what I’m seeing, I can only conclude that it’s incorrect. It wasn’t happening prior to late February. At that point it happened once or twice. Since a few days into March, Shopify has accounted for virtually all returns twice each in the Cost of Goods Sold report. I don’t know if it’s just the reports that are wrong, or whether it’s sending incorrect data to integration software that also sends data onward to accounting software, because I’ve cancelled the software I was using for that in favour of doing bookkeeping manually now.
(We were using the Amaka integration for Shopify and Xero, but cancelled it for other reasons before discovering this situation with COGS - and we spent about 12 person days re-doing our bookkeeping for a nine-month period. I’ve lost count of the number of different systems I’ve tried for integrations over a 7-year period, and from that I think it’s fair to say that generally companies who describe their integration as “seamless” are brazen liars.)