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?

[jaracv]

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.

[KatrinaB]

You should e-file your return as it will be processed more quickly and the IRS already has a copy of all W-2 and W-2C forms you have received. The IRS also encourages taxpayers to file electronically. If you do decide to mail your return then you do need to send a copy of all W-2s and W-2Cs. 

Please view the IRS link below for more instructions on when, where, and how to file.

https://www.irs.gov/taxtopics/tc301