I am not currently creating any entries. Square is synced with QB, and my bank account is also synced with QB. When the deposit from Square hits the bank account, QB the identifies the deposit as a "match" from the Square transactions. When I confirm this match, that's when the duplication of sales activity posts to my P&L - it posts from the Square sync and also from the deposit/match.

The posting account is not different.

I am still unclear as to how to categorize these deposits, since the Square activity is already being recorded as Sales on the P&L.