I'd like to ease your confusion, Sadalbarie. You will adjust the current VAT return.

When you change or delete transactions from the previously filed VAT, it will show in the Exception column or report. This is to make sure no VAT collected are missed or duplicated.

Although, I'd suggest reaching out to our customer care support, so an agent can take a better look at your VAT filings. Here's how:

1. Click Help inside QuickBooks Online. 
2. Select Contact Us.
3. Enter "Adjust VAT return" in the description field, then click Let's talk.
4. Select either Start a chat or Get a callback. 

We're just around if you need our assistance.