Deductions & credits

thanks

bought home in 1999 for 275k

wife passed on 24may2021

sold home in 2023 for 1.5 mil

our trust says we should have step up in home cost basis.

what form in tt do i use to define what the step up cost basis is.

we have 3 estimates for equiv property when wife passwed.

need to know what to do to reach current home basis for sale of property in 2023!!