Property sold in F .Yr 19-20 but not taken ITR

Whether the payment received by any banking mode or by CASH?

Whether the agreement registered with Sub-Registrar? or before any Judge?

Firstly, the document is not valid document as per Transfer act.

Moreover, you and the purchaser both will be in trouble if you try to declare the HIGH VALUE CASH TRANSACTION, WHICH IS BARRED AFTER SINCE 2016.

YOU SHOULD HAVE ASKED FOR BANK TRANSFER OR CHEQUE.