As long as you have not e-filed yet, you surely can add information.
To enter the student loan interest in the TurboTax Deluxe online program, please simply follow :
1. After sign into your account, select Pick up where you left off
2. At the right upper corner, in the search box, type in 1098e and Enter
3. Select the 1st choice on the search results - Jump to 1098e
4. On-screen, Did you make any student loan payments in 2016? select Yes and follow the prompts.