I need to file my son's tax return but the system keeps bringing me to my tax return and won't let me start a new one.

[CarolynM]

Unfortunately, TurboTax Online products can only do one tax return.

You will need to create a new account for your son's tax return.

If you want a product that can prepare more than one tax return, you need to use a CD/Download product.

Follow this link for product information: CD/Download Product Guide

[VolvoGirl]

The Online version is only good for 1 return. But you can use the same email address for 5 accounts.  To do another return you have to set up a new account and new user name and pay any fees again. 

https://ttlc.intuit.com/replies/3288574