Hello Cait-S,

Currently, there isn't an integrated way to change to set up your subaccounts in QuickBooks Self-Employed. Let's consider manually selecting the category you need to use every time you review your bank transactions.

In the same manner, here's an article you can read to learn more about the categories of your transactions: Schedule C and expense categories in QuickBooks Self-Employed.

On top of that, I've also included this reference for a compilation of articles you can use while working with us: Banking for QuickBooks Self-Employed.

If there's anything else that I can help you with, please let me know in the comments below. I'll be here to lend a hand.