New client put rental real estate into service during 2018. Sch E, 1040. The client did a rehab before getting it into habitable condition and advertising. On the 2018 return, the client reported quite a bit of what were improvements to the building structure and building subsystems as 5yr assets and subsequently took S179 on them. Client is an RE pro. 2019 has been filed. 2020 has not been filed yet and is on extension.
Is my only option here to recalculate S179/depreciation and do a 3115 in 2020? I am amending 2018 and 2019 for an unrelated reason, so we have to amend regardless.