Impact of Inactivating a Timekeeper

The only thing inactivating a Timekeeper really impacts is the ability to enter new fee transactions for that Timekeeper ID.  Any unbilled time in the system may still be invoiced and payments may be applied to any open AR for that Timekeeper ID.  All reports either automatically include inactive Timekeepers or give you the option to include them (Staff Productivity Reports).  Also, if need be, you can always activate the Timekeeper again (assuming you have available licenses).