Oh right. You can enter it in the Free File website. Don't know where you are stuck. Are you over in the IRS Free File website or just in the Turbo Tax Free Edition?
In order to use the Free File program, you have to start it at a special website. Try signing in at the top right.
https://freefile.intuit.com/
How to switch to the Free File website
https://ttlc.intuit.com/community/downgrading/help/how-do-i-switch-to-turbotax-free-file-program/01/...
