My client registered for VAT mid tax year and the first VAT period is 4 months long, then onto quarterly. How do I create an exception return for the first four months?

Hello Camellybookeepin, thanks for posting on the Community page, Is the exception to reclaim pre-registration VAT? If so you could make sure they have no VAT set on any transactions you are reclaiming, then mark a one day period as filed for the day before the start of the first period and then add in the VAT on the transactions they are reclaiming for to create exceptions, or you can use the adjust option on the prepare return screen to adjust the VAT amounts for the first period.