Forum Post: How to Discount Time Worked

We have a client we need to bill on an hourly basis (we're new to TS). If we work 6.5 hours but only want to bill for 5.5 hours, how do we do that so it shows the client we are deducting that hour. We see in the timeslips options to not bill for time, but aren't sure if that's the right place. Do we need to do a credit on the invoice separately and just enter time as normal or is there a way to do this in the timeslip? Thanks so much! Nick