You do not need to enter your selling expenses. All you have to do is add your selling expenses to your basis. Your basis that is reported should include what you paid for the property, plus any improvements to the property over the time period you owned the property, then add your selling expenses. This gives you your total cost basis.
If you rented the property during 2021 before you sold the property then you would report the income and expenses for the rental on Schedule E.
