I am the client trying to import my QB Accountant's changes.  I am trying in two different companies.

Company One is in QB Premier Retail Edition 2018  (Here, I get an error as soon as I select "Import Accountant's copy.")   

Company Two is in QB Desktop Pro 2021 (Here, I get the window for incorporating Accountant's Changes, I get the report of transactions that the accountant made but the "Incorporate" button does nothing.  I can get a .pdf of the transactions shown, but no other buttons work.

I just spent an hour with Customer Support by chat only to get asked to purchase a support plan in the end.  I didn't.