Hello Community Users. We just wanted to pop into this thread to add a helpful article for MTD issues, such as not being able to file the return here the latter part of the article specifically deals with the errors you may see and how to fix them

There is also a handy link for HMRC  which shows status updates which is worth checking incase HMRC have a problem with their systems.

If you're having any difficulty submitting please feel free to add a comment here.