How do I print an invoice showing it has a balance due of $0? I can print the invoice showing it is paid. But the bottom still shows a Total amount.

I can print the invoice showing it as "PAID".  But the Total at the bottom still shows the total amount due.  I want it to print Balance Due = $0 at the bottom.  I've seen others done this way.  On screen at the bottom, outside the invoice information, it shows Balance = $0.  But this does not print.