New to QB. Paying VAT for my quarter Feb-Apr, but have already paid for Feb! How to make QB forget that single income transaction from Feb but keep bank + QB in sync?

Hi there, and thank you for choosing QuickBooks Online, mohasi-protonmai.

I'm here to help manage your transaction in the system. Since you've already tax liabilities in Feb, you need to pay the remaining VAT balance for the quarter. 

Forgetting the single income transaction will mess up the record since it's already posted on your bank account. 

Here's how to pay your VAT return:

1. Go to Taxes, then select VAT
2. Select Submit return to view your open return.
3. Confirm the dates and figures are correct. When you are ready to submit your VAT return to HMRC, select File online with HMRC.
4. Enter your Government Gateway User ID and Government Gateway Password, then select Yes, I want to proceed.
5. QuickBooks Online will now connect to HMRC to submit your VAT return.
6. When HMRC receives your VAT return, you will see the "Pending with HMRC." status and a message which says "HMRC is on the case.
7. We'll notify you when the status of your VAT return changes.
8. Select Close and continue working.

If your VAT submission is successful, the status will change to Approved by HMRC. You will be able to see the filing when you log into your HMRC account.

If you've done the payment manually, here's how to record the payment: Manage VAT payments in QuickBooks Online.

Don't hesitate to post again if there's anything else you need about paying VAT returns. I'll be right here to help you.