If irs sent me a letter asking for my w2

Then send them a copy of your W2.     They probably want to verify the withholding on it.  Maybe they didn't get the original W2 from your employer to match it up.  

When the IRS sends you a letter that requests information from you or requests a copy of a tax document like a W-2, the best way to react is to follow the instructions given to you in the letter.  If you do not have a copy of your W-2, ask your employer for another copy.  TurboTax does not have a copy of your W-2.