@Fanglet wrote:
The portion of the rental property that I did not own was given to me in a quit claim deed by my dying parent....
You could make a case for an implied life estate which would work out better for you in terms of the basis of that share of the property (your basis for that portion would be the fair market value on the date of death of your parent).
See https://www.law.cornell.edu/cfr/text/26/20.2036-1
