If your CRA account was compromised in the 2020 hack you can fill out a claim form (link in the article) to claim your share of the class action lawsuit settlement.
Was your CRA profile hacked? $8.7M lawsuit settlement claim now open | CBC NewsThe claims process is now open for those seeking their share of a $8.7-million settlement in a class-action lawsuit involving tens of thousands of Canadians.www.cbc.ca