VT Transaction+ and VT Cash Book (MTD now included in downloads)
VAT returns can be submitted from both VT Transaction+ and VT Cash Book. VT Cash Book is a free product except that after 60 days a license for VT Transaction+ is required to use the MTD features (including creating a VAT return).
The MTD features have been designed to be self explanatory. However, instructions are also included in the MTD for VAT chapter in the VT Transaction+ user guide and help topics (Help>Topics).