I am not covered by a retirement plan at work, box 13 is not checked on my W2, so why won't Turbotax let me deduct my Roth contribution

[MinhT1]

Contributions to a Roth IRA are not tax deductible.

Please read this IRS document for more information.

[lisieflav]

I contribute to a Traditional Roth, not a Roth IRA.

[BillM223]

There is no such thing as a "traditional Roth". There is either a "traditional IRA" or a "Roth IRA".

So are you contributing to a traditional IRA and are wondering why there is no deduction allowed?

Please see "Retirement topics - IRA contribution limits" as a starting point.