How do I reconnect to HMRC for MTD

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:

1. Go to the Gear icon, then select Account and Settings.
2. Choose the Advanced button.
3. Click Making Tax Digital and hit Learn how to connect.
4. Select Let's go and pick Continue. 
5. Enter your MTD user ID and password. 
6. 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.