I generated my first VAT Return using dates 30/09/18 - 29/12/18 and downloaded the calculations in order to check them. I noticed that a sales invoice dated 05/01/19 & four purchases after 29/12/18 have been included. Other than deleting them, how can I prevent this? I have checked each purchase/sales invoice to make sure I have entered the correct dates.
Any help would be appreciated