Hello and Welcome to the Community, debbieeveburch 🙂
We can certainly help with that here, are you connected to MTD in QuickBooks?
What start and end dates do the current open return show and what are you expecting these to be?
Hello, debbieeveburch, Are you connected to Making Tax digital in the taxes section? If so the period dates would be set by the obligations(period dates they advise) and can not be changed unless HMRC advises us they are incorrect. If however you are not connected to MTD, as that date QB is producing is a quarterly return has HMRC advised the End of September is the date for the return period to end? Does it show the same date 30/09/2020 in the government gateway? Thanks