How do i Add Taxes after the total?

How do i Add Taxes after the total?

is there a feature of custom field that allows me to calculate a VAT after the total has been added.

I want to be able to calculate a final VAT on the total amount rather than to add it to each item.

lilke this;


Subtotal = $000
Tax 1 = $000

Total = $ 000
VAT = $000

Grand Total = $0000

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