I have joined quickbooks and have already sent invoices for this VAT period. I do not want to raise invoices but enter their details so I can submit VAT digitally

Hi ann-knights, 

Thanks for joining us here on the Community! If the sales have already been made, you can instead record these using sales receipts (you can raise a sales receipt per sale or as a bulk, e.g. daily or weekly, depending on your preference).

Alternately, if you have your live bank connected, you can add the downloaded payments directly into your books after reviewing the details in the for-review tab and we'll create the sales receipt for you. :)