If I get a W-2C, do i just fill in the info that is included in my W-2C? or do I fill in the info that was in my W-2 but correct the discrepancies listed in my W-2C?

deployed soldier and got a W-2C after they corrected my pay. not sure if I just enter the W-2C or both the W-2 and then add in the W-2C information