Can I just press "ADD" on the banking if I know the VAT code for that item/ suppliers if I don't have a receipt or invoice?

We're happy to see you here, letsgobonkers2!

If you know the VAT code, you can assign to the transaction. But before you click the Add option, please don't forget to catgeorise your transaction. That way, everything will be added to your books accordingly.

Feel free to post again if you need anything else.