To use Forms 5498-SA to determine your HSA contribution for a particular year you must get information from that year's Form 5498-SA and the previous year's Form 5498-SA. For example, the amount contributed for 2018 would be the amount in box 2 of the 2018 Form 5498-SA plus the amount in box 3 of the 2018 Form 5498-SA minus the amount in box 3 of the 2017 Form 5498-SA.
