Refile will be available to use tomorrow March 27th for online users. You will see the option on the opening page of your online account. More below if needed.
- From TurboTax - What is REFILE https://turbotax.community.intuit.ca/replies/3639538
To Review start at the Review tab and it will walk you through your warnings errors and tax saving tips, and proceed to Netfile from there.