also related: https://developer.apple.com/forums/thread/711031

For in-app purchases, I believe it's from here? https://developer.apple.com/documentation/appstoreconnectapi/app_store/in-app_purchase/in-app_purchase_price_schedules

According to this answer, it is the latter (store credit). https://apple.stackexchange.com/questions/453265/app-store-refund-when-a-user-upgrades-a-subscription-on-app-store?noredirect=1#comment658401_453265

I'm also not seeing it for the past few months, since period ending 11/26. did you receive anything? https://api.appstoreconnect.apple.com/v1/financeReports?filter[regionCode]=ZZ&filter[reportType]=FINANCIAL&filter[vendorNumber]=123&filter[reportDate]=2022-12

Did you find a solution?

Figured it out. See Apple doesn't want the actual year and month from the Gregorian calendar, but rather the year and month of their own fiscal accounting calendar. So 01 is October, 02 is November, and so on. https://developer.apple.com/forums/thread/114240?login=true https://developer.apple.com/forums/thread/665639