Because there is a "glitch" in the IRS tax system according to TurboTax I was unable to e-file this year for the first time in years and years. I had to file by mail because they had a problem validating that my return came from me with their new fraud protection. File early in case you need to run out to buy these envelopes quickly.
Staples provides incredible service! Their prices are reasonable the store is easy to navigate their staff is always friendly and helpful. I recommend if you have not tried Staples give them a try!