This has been an issue this year for TurboTax. One Expert suggested disabling your virus protection software. That may work.
The other option is to enter your W-2 manually into the program. That's what I'd recommend. I'm linking the TurboTax FAQ with instructions below.
How do I import or enter my W-2?
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***