Sales property not reported

Kollipara Sundaraiah (B.com) (2963 Points)

05 January 2022  
it assessee purchase of apartment value rs:15 lacs in f.y.2017-18 year. assessee sales of apartment value rs:30 lacs in f.y.2019-20. if sale of apartment transaction value not reported (missing) in f.y.19-20.
question:
1.apartment sales capital gains applicable
2.how to show procedure sales value in it returns.