I found some help on another thread - in a nutshell if you go to the VAT page, edit settings, then turn MTD off on the toggle button. Then click on any returns that might say pending, when it opens click the green button that says Mark as Filed, do this for all of the open returns that have already been filed until the one you need is available. Then switch the MTD back on and it should work....at least it did for me! I spent an hour or two reading through loads of threads on here! Good luck! Let me know how you get on. Ali. :)
