What does "Add" do in Banking

Hello HenryDK, 

Welcome to the Community page, 

So Add means QuickBooks didn’t find an existing matching transaction. Instead, it started a brand new transaction for you using the info from your bank or credit card. If you have a look at this help article it have more information and the steps you need to do as well for add. You can also look at this article here as well which also tells you about option and steps.