What is first copy or Copy B of Form(s) W-2?

[aartyagarwal]

I need to file my returns my mail and it was written that I need to attach the first copy or Copy B of Form(s) W-2 to the front of your Form 1040.

What is first copy of W2?
Copy B of Form W2 means the left corner sheer that can be teared off from original W2?

Is it ok to print the electronic copy of W2 when filing by mail?

[Opus 17]

It depends on how your W-2 comes.  Years ago they were carbon paper forms, copy A (the top copy) was sent to the IRS by the employer, copy B was the next layer that you sent to the IRS, and so on.   These days your W-2 is likely to be a pdf file or something mailed to you that has 4 copies on a single folded up piece of paper that you tear or cut on a dotted line to separate.  At the bottom of each copy there is a statement that says "COPY B--To be filed with employee's federal tax return" or "COPY C" or whatever.

Likely, since all copies are the same, it doesn't matter.  But they are labeled if you look for it.