I haven't looked at a live 1040 in years...been e-filing since the 90s, so I can't begin to tell you exactly where it fits, but yes it only applies if you itemize- it does go under miscellaneous.

IIRC, in TT you go into 'miscellaneous credits' (even though its a deduction) and look for 'clean fuel vehicle.' So it follows that the same names are used on the live forms.

You can probably poke through the IRS site and find it under clean fuel or something like that to get the specific guidelines.