Create an early payment discount term that takes the 10% due to the government and discounts the invoice by that amount when it's paid before a specifc date (you'll want to have that date a long way in the future). Charge these discounts to the liability account in your g/l. At the end of the month, list the transactions in the account and remit it to the government.

Your Adagio consultant should be able to help you with the specifics.