No, you do not
enter any information about Roth 401k contributions in the Roth IRA section of
your return.
If you are contributing to the Roth 401k as a self-employed person, then there is a
place to enter that information.
Otherwise, if your contributions are through an employer they will be
shown on your W-2 and entered along with your other W-2 information.
For the case of a self-employed
401k contribution, use these steps to go to that section of your return:
On the top row of the
TurboTax online screen, click on Search (or for CD/downloaded TurboTax
locate the search box in the upper right corner)
This opens a box where you
can type in “self-employed retirement” (be sure to enter exactly as
shown here) and click the magnifying glass (or for CD/downloaded
TurboTax, click Find)
The search results will
give you an option to “Jump to self-employed retirement”
Click on the blue “Jump
to self-employed retirement” link and enter your information
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