Is this a lease with an option to buy or an installment sale?
For a lease with an option to buy see https://www.irs.gov/publications/p527#en_US_2019_publink1000218975
If this is an installment sale see https://www.irs.gov/taxtopics/tc705
Either way, you might want to seek professional tax guidance if you are unfamiliar with either scenario.
