Is there anyway to clear out non billable time once it is entered and shows on a billing memo as services? And does detail of this time show up anywhere except the time util reports?

Normally what we do is final bill anything that needs to be cleared out at $0.00 but there is no option to type in a six character non billable code in the bill processing screen to final bill it out - it only allows 4 characters which are regular source codes.