Have you tried this way ?
To remove a form from the program, in the TurboTax Free Edition version, please go to:
1.Sign into your account, select Take me to my
return
2.Select My Account (top of screen)click
on the drop down arrow
3.Select Tools
4.Under Other helpful links, choose Delete a form
5.Select Delete next to the Form 2555-T and Continue
with My Return