Guest will be charged VAT if the Tax Item is one of the following:
Accommodation
Fee/Upsells
Penalty
VAT will be charged to the Owner (not the Guest) if the Tax Item is Management Fee. In this case, the VAT amount is added to the Management Fee, and the guest will not be affected.
For more info, study here: https://support.zeevou.com/en-gb/articles/101-tax-rate