You don't necessarily need to go back to change the state information. While going through the Federal Review, you will see a "Check this entry" interview scree...

You don't necessarily need to go back to change the state information. While going through the Federal Review, you will see a "Check this entry" interview scree...

If you already e-filed using TurboTax, then no, you do not need to mail your return to the IRS.

The employee's taxpayer identification number in box a on the Wage and Tax statement transfers from the Federal Information Worksheet. Please ensure that your s...