My uncle passed and his spouse received His T4RRif..It was issued to her, where does it go? is it deducted on another line?

the T4Rrif was transferred to my aunt when my uncle passed in 2017..a slip was issued to her..when doing her taxes she claimed it but was under the impression because it was a transfer that it was a deduction as well..she is being heavily taxed because she has received this and the program isnt claiming the deduction..if there is one..HELP