Hello there, simplyoakboutiqu.
I can help you fix the error message received while working with your bank transactions.
Before adding the transaction, ensure to categorize it to resolve this issue. I've included a detailed resource about categorizing transactions for reference: Categorize online bank transactions.
If you're unsure of what account to use, you can consult your accountant to help ensure the transactions are accounted for properly. Doing this ensures the accuracy of your books.
Further, you can reconcile the account to ensure the accuracy of your transactions, providing an accurate representation of the company's position.
You can post again if you have further questions about bank feeds. We're here to help you.