This worked for me last year but this year (TT 2021) does not have this option under Miscellaneous Income.
I followed advice on IRS website here (Answer 11) (same as @Hal_Al says for last year) and put it on blank line 8 for other by using the 1040/1040SR WORKSHEET; this is the only place Schedule 1 is fillable and it populates through other forms from there. I could not insert in the step by step miscellaneous income section. Maybe just me but the "other reportable income" prompt was specific to other situations but not this one this year, did not let me enter.
So, using forms in Turbo Tax 2021 (not step-by-step):
W-2 says $0 in Box 1; I changed it on W-2 form to Box 5 amount.
I then went to 1040/1040 SR worksheet and scrolled down to Schedule 1 blank lines on line 8.
Entered IRS Notice 2014-7 and then put the amount I'd entered in Box 1 above as a negative number.
This calculated the Earned Income Tax Credit and populated the filing forms correctly.
