Can i change the email address associated with a certain individual in my family

Yes, you can change the email address associated with your son's return.  

 

Please follow these steps to change the email address for his account:

 

1. Sign into his Intuit Account
2. Click on the Sign in & Security box
3. Click the Email Address box
4. Enter his Email Address, confirm it, and then select Save

Please see this TurboTax Help Article for additional information:  How do I change my TurboTax account email?