How do I delete a unsubmitted VAT return so i can start again with different dates?

Greetings, intheblack.

Thanks for joining the Online Community. It's my priority that you receive the best assistance for deleting the unsubmitted VAT return.

The opening of a customer's account requires personal verification, and for security reasons, we’re unable to gather them here in the Community. For this reason, I recommend calling our QuickBooks Online Support Team, since they have tools to help you remove the tax form in your account.

You can reach them through the following link:

1. In your browser, enter this link: https://quickbooks.intuit.com/uk/contact/.
2. On the Contact QuickBooks page, go to the Help and Support section.
3. Choose QuickBooks Online to see the phone number.

There you go. You should now be able to create a new VAT return with different dates.

For future reference, I'm attaching an article that will help you record and process a VAT refund: Tax payment.

If you have additional questions about working in QuickBooks, leave me a comment. I'll right here with you. Wishing you the best.