Finance Charges

SOLVED

I am working on Sage 100 v 4.5.  We are just starting to charge a finance fee.  I have gone into AR and set up a 1.5% charge to calculate on any invoice 15 days past due.  Do I have to go into each customer and set up the finance charge percentage?  I thought filling in the information in AR setup would do the trick but nothing happens when I hit proceed.