Solo 401k After-Tax contributions

[mjedlin66]

Turbotax home & business doesn't have a place to enter after-tax contributions to an individual 401k plan. It only has spots for elective deferrals (traditional), employer contributions, and Roth.

There is another category called after-tax that is used in the mega backdoor Roth conversion. I have such an after-tax solo 401k, where do I enter my after-tax contributions?

Thanks

Matt

[dmertz]

After-tax contributions to the solo 401(k) are not reported anywhere on your tax return so there is no need or provision to enter them into TurboTax.  You'll need to do your own calculation to make sure that you are not exceeding the section 415(c) limit on total contributions.