you can't. each type of asset falls into a class. the tax laws specify a specific life based on the class. an override would result in you having to paper file. you may want to review IRS PUB 946 to see if you placed the item into the proper class.
this is the 2020 version 2021 version isn't ready yet.but I don't think there were any changes in classes or class lives.
https://www.irs.gov/pub/irs-prior/p946--2020.pdf
