This is my setup under Arrangement 2: 12%, Compound, Charge interest at 30 days, Grace period 0, last bill date March 7. Problem: Clients are being charged interest even though they paid the balance in full on March 22. I checked around to see why and found under Client History a charge of $945 designated "Unbillable Fees and Costs. I found that the 945 "No Charge" was for the initial consultation back in February. Problem: I cannot change the $945 from "No Charge" to "Do Not Bill" because the slip cannot be revised after the bill has been sent. How do I get Timeslips to quit charging interest on a "No Charge" fee?