If I file by mail, should I attach my original W-2 and the two W-2'cs my employer issued me when I send in my tax return?

My employer got multiple things wrong on my original W-2. As a result they had to issue me 2 W-2c's to fix the errors.  

Also if I decide to e-file, although TurboTax states I don't need to include my W-2, I wonder if its better to file by mail so I can send in the original and two corrected W-2c's.