I've got you, @Williaam4.
I'll help to reconnect the QuickBooks Online to HMRC for MTD. This way, you can submit a VAT return in an MTD-compliant way.
Complete these steps:
- Go to the Gear icon, then select Account and Settings.
- Choose the Advanced button.
- Click Making Tax Digital and hit Learn how to connect.
- Select Let's go and pick Continue.
- Enter your MTD user ID and password.
- Pick Grant authority, then Continue.
For visual instructions, see this article: Turn on MTD for VAT and connect QuickBooks to HMRC.
Additionally, you can bookmark this article on how to fix common MTD issues, VAT codes, and other related matters: Submit an MTD for VAT return to HMRC in QuickBooks Online.
Please post a reply if you still have other questions or concerns about taxes. I'll be around to help. Take care and stay safe.