Yes, he would need to record the transaction on the Capital Gains screen. On this screen under Real estate and depreciable property he would record his percentage of the transaction.
The fields that need to be filled out are:
Address or legal description
What province or territory the house is in
The year acquired (purchased or inherited)
Total proceeds (how much the house was sold for)
Total adjusted cost base (how much he paid for the house or the value of the house when he inherited it)
Total outlays and expenses (any costs associated with the sale such as real estate and legal costs)
He will want to make sure that he only records his portion of all the numbers and that the other co-owners do the same.
