Sage Timeslips

We have not billed a client since November, but want to bill him now. How to I prevent Timeslips from charging for five (5) months of interest and instead charge for only one (1) month?

I have setup interest correctly. No doubt about that. It calculated correctly for every month up until now. My last billing cycle was December 1, 2016. On those bills, interest appeared from November 1-November 30. When I attempted to do bills today,…