Thank you for posting here in the Community. I can share some details about the banking feature in QuickBooks Self-Employed.
Currently, the option to select an account when manually creating a transaction is unavailable. The system stores your data directly to the Cash account.
There are two workarounds you can use to record them to the right account. You can either upload your banking data or link the account and categorize downloaded transactions.
To import data:
Click the Gear icon in the upper-right corner.
Select Imports.
Choose an account.
Press Import older transactions.
If you want to link the account, please follow these steps:
Click the Gear icon in the upper-right corner.
Select Bank accounts.
Click Connect another account.
When you import or categorize downloaded bank data, your transactions will be stored straight to the respective accounts.