CGT on gift of a house to son

CGT on gift of a house in February 2021 was declared within 30 days by parent and CGT was paid in full.  The house was rented to son and was not the main dwelling of the parent.  The parent is completing his Personal Tax Return Self Assessment information and expected the CGT page to prepopulate but nothing shows on HMRC SA Return.  So does all the CGT information needs to be entered again on the 5th April 2021 Return?