@ah
You can determine your unadjusted basis be reviewing IRS Publication 946 (link below).
https://www.irs.gov/publications/p946#en_US_2019_publink1000107561
I believe you are referring to the Safe Harbor Election for Small Taxpayers.
See https://www.irs.gov/businesses/small-businesses-self-employed/tangible-property-final-regulations#Sa...
