I would like to prepare a return for my daughter (it's her first return). Should I create a new Turbo Tax account for her or just create a new return under my account?

Yes, you can complete your daughters income tax return under your account.  Since it is your daughters first time completing an income tax return please note that it must be printed and sent by mail.

How do i open a return for my daughter on my account?

You will need to sign into your TurboTax account, and click on start a new return.

Thank you for choosing TurboTax.