Let me route you to the right support team, @crisscrossservic.
First, please ensure to use the correct tax year when moving your data from QuickBooks Self-Employed to Xero.
If the same thing happens, I recommend getting in touch with the MoveMyBooks support team. They'll be able to assist you with the tax year mismatch issue you're having.
Please know that you can always resubscribe in the future.
I'm always around to help with more tax concerns you may have. Just add your comment below so I can assist you right away.