When using TurboTax Standard, click on the heading titled Setting up and then click on Intro. 

Click on Revisit next to Personal Information and click on edit information.

You will then be able to make any necessary correction to your date of birth.

There isn't a question though to ask if the Canada Revenue Agency already has your complete date of birth on file.  It will ask though if you are a first time filer.  You can check with the Canada Revenue Agency at 1 800 959 8281 to verify if they do have your date of birth on file.