I plan to contribute the 6k limit to my Roth IRA this week, but I want to finish my taxes before then.Where does Turbotax give the opportunity to account for my Roth IRA?

Enter IRA contributions here:
Federal Taxes,
Deductions & Credits,
I’ll choose what I work on (if that screen comes up),
Retirement & Investments,
Traditional & Roth IRA contribution.

OR Use the "Tools" menu (if online version under My Account) and then "Search Topics" for "ira contributions" which will take you to the same place.

A Roth IRA contribution does not actually go on a tax return, but you should enter it anyway to:

1) Tell you if your income qualifies you for a contribution and warn you if it does not.
2) Check if your income exceeds the limit to contribute to a Roth.
3) Track your contribution year-to-year if you use TurboTax every year.
4) Add the Retirement Savers Credit if you qualify.

To enter your Roth IRA contribution:

1. Select Federal on the left side menu.
2. Select Deductions & Credits from the top menu.
3. Scroll down to Retirement and Investments, show More.
4. Select Traditional and Roth IRA Contributions and start/revisit.
5. On the Traditional and IRA and Roth IRA screen, select Roth IRA and Continue.
6. Continue with the onscreen interview until complete.