I have the same problem. I've been using MTD for quite a few years now, submitting quarterly returns. The 3 options on the next page all result in the same error message. I have already signed up for MTD so it's not the first. The second link doesn't help and the 3rd just brings you back to this page once you've inputted your VAT number!
I have also tried disconnecting QB from MTD and HMRC and then reconnecting. Still the same error code.
I seem to be stuck in a loop. Please advise how to fix as I only have till the end of the week to file my VAT return!
Thank you
Have you signed up for Making Tax Digital for VAT?
You need to do this before you can authorise QuickBooks to connect to HMRC.
Did you get an email from HMRC to confirm you signed up?
If you've been waiting more than 72 hours for this confirmation, get in touch with HMRC.
Does your VAT number in QuickBooks match HMRC's records?
