Hi Nick
We presume the transaction was purely VAT and was paid from your bank account. If this presumption is correct you will have to:
Select the create/plus icon in the top right hand corner of the screen > Expense > In the payee section create/enter the company that you paid the amount to > in the payment account enter the bank account the amount was paid from > In the payment date enter the date that the amount was debited from your bank account > in the amounts are section select Exclusive of Tax > in the category section on line one select purchases > in the amount column enter 0.01 > in the VAT column select 20%S VAT code > on line two in the category column select purchases > in the amount column enter -0.01 > in the VAT column select the Exempt VAT code > .enter the amount total amount of VAT you paid in the VAT box > save and close.