Does she have any other income?
To determine if she has to file see https://www.irs.gov/help/ita/do-i-need-to-file-a-tax-return
She can file her tax return using her social security number.
To do so on the desktop version, when you first open Turbotax, click the I want to start a new return link.
Enter her Personal Info. Be sure to click the appropriate box that she can be claimed as a dependent on your return.
Follow the conversation and prompts from there.
