Centeno
Returning Member

After-tax elective deferral contribution to a Solo 401K

In 2022 I maxed out the contributions to a Roth 401K with my primary employer ($20,500). I also made a $4,000 elective deferral contribution to my traditional Solo 401K (I had a side business with net income ~5K).

I expected TurboTax to treat my elective deferral Solo contribution as an after-tax contribution since in aggregate all my contributions exceed the IRS maximum elective contribution limits.

But Turbo Tax is treating my solo as a pre-tax contribution (reducing my owed tax). What am I missing?

Any tips/advice on what to check on turbo tax to make sure my Solo contribution is treated as after-tax?

Thanks...