Prior to the software update in January 2019, the software was able to view the date your own VAT liability deadline on the details of the VAT submission, unfortunately this function is no longer available. This is no longer available since HMRC MTD API integration settings no longer provides us with this detail, so we are unable to pull this information through.
If you wish to view this information, you are able to log into your HMRC online account and find details of when your payments are due.