Log into your account, scroll down
a bit and select, 'add a state'. You aren't really adding a state, just opening
up the return.
Then navigate to the Retirement section under Deductions and Credits and enter your Roth IRA contribution.
You can print/view/save your tax file under Tax Tools, Print Center. Select the option 'Include government and TurboTax worksheets'. Your Roth IRA basis will be included on the 'IRA Information Worksheet.'