You can set how the VAT is displayed on invoices and how the VAT is applied on price components (no, including or excluding VAT). This can be set under Dashoard > Payment > Payment Settings > VAT settings. (see image below).
You can set it per price component on the same page, go to tickets.
1. Fee components with No tax
No VAT is shown for price components.
2. Fee components excl. VAT
A VAT field is displayed for price components where the VAT percentage can be entered. The amounts entered are exclusive of this VAT percentage.
3. Fee components incl. VAT
A VAT field is displayed for price components where the VAT percentage can be entered. The entered amounts include this VAT percentage.
The choice to enter amounts including or excluding VAT for price components also has an effect on how these amounts are shown to your participants. If you assume that amounts include VAT, these amounts are also used as a starting point for your participants. The same if you choose for excluding VAT amounts.