Hi MJL28,
There is nothing in the guidance regarding living in the property prior to completion.
You have stated that the completion certificate won't be issued until June 2024, so you can put a claim in once you have recieved the certificate.
We have been advised by the DIY unit that it is fine to submit a claim on this basis.
You have 3 months in which to submit from date of certificate issue, please refer to guidance to make sure all conditions are met
VAT refunds for new builds if you’re a DIY housebuilder
Thank you.