@gpientka While I believe fees for Solo 401k plan admin are deductible, I don't think putting them as a "Pension Plan Startup Cost" is accurate. I was told those fees go as an expense on Schedule C. Putting in some Pension Plan Startup Cost is indeed a workaround that can then let you access the auto-enrollment credit screens in TurboTax. But most of us sole proprietors don't actually have anything that is realistically categorized as "Pension Plan Startup Costs". I guess claiming these Solo 401k fees are startup costs is one way to tweak things. At one point I played with claiming I had an employee and entering something in startup costs so I could access the auto-enrollment screens but then later going back and removing the employee and startup costs, but ultimately I don't think it worked properly at that time. In any case, I don't think it's actually appropriate to put Solo 401k admin fees there, but someone can correct me if I'm wrong. Also not sure where on the return it puts those fees if you enter them as startup costs. Sole proprietors don't qualify for the startup credit so if it's in any way affecting that, then it would be quite incorrect I think.
