Hi! I am mailing in my taxes, do I sign every paper that says, "sign here"? Also do I mail the state and IRS together in the same envelope or separate?

[AnnetteB]

There should be one signature page for each tax return.

You mail the state return and the Federal return separately.  They are going to different places for processing. 

The TurboTax cover sheet that printed with your returns should give you the mailing addresses and any additional instructions.