Hello mikembs,
Welcome to the Community - thank you for your question!
To create a 100% vat expense:
1. Click on the + sign and select expense.
2. On the first transaction line, choose the account you want to use. For the rate, enter £1, and for the VAT code, select the 20% Standard code.
3. On the second line, select the same account. For the rate, enter -£1, and choose an Exempt code.
4. The total of the invoice will be 0. You can then edit the amount in the VAT box to whatever you need it to be.
Please let us know if you have any further questions.
Thanks,
Talia