How do you subtract retention on invoice?

To subtract retention on an invoice, first identify the retention amount, which is typically a percentage of the total invoice value withheld until certain conditions are met. Then, deduct this retention amount from the total invoice amount to calculate the net amount due. For example, if your invoice is $1,000 and the retention is 10%, you would subtract $100, resulting in a net invoice total of $900. Make sure to clearly itemize both the total and the retention on the invoice for transparency.