Medicaid Waiver Payments, W2 box 1 blank, new box 12 code II, E-file questions.

Hi. I have Medicaid Waiver Payments. My W2 box 1 is blank and I know I cannot e-file my tax return. However, this year the IRS include a new box 12 code II. If my W2 box 1 is blank and I enter a value in box 12 code II, can I e-file? Please verify this for me....thanks.