I have a W2 with only boxes 12a and 14 filled out

I received a W2 from a former employer with only boxes 12a and 14 filled in.   12a is for cost of coverage under an employer-sponsored group health plan, and box 14 says MAPFML with an amount of $0.14.  Turbo Tax is telling me I must file by mail because of the lack of wages from this W2, if anyone has other advice or can explain further it would be very much appreciated!  Thank you!