I have a w2 from my employer with just an amount in box 12a for employer contribution to HSA. my box 1 is zero on this w2 so i cant file electronically only by mail now??

i have a second w2 from my employer with just an amount in box 12a for employer contribution to HSA. my box 1 is zero on this w2 so i cant file electronically only by mail now??  is that correct