Tax fixed amount

Hello,

we have case where we wanted to show TAX in fixed amount, not based on percentage., that is only applicable on one particular transaction type.

as VAT is 5% but we want to create invoice where tax amount is fixed eg: 10 AED.

my understand is that

i need to create new tax rate in that i need to mention tax amount (fixed amount)

than i need to create new tax rule and apply that tax rule in particular transaction type ?

is it correct?

Thanks