I am self-employed as well as have a W-2 position with another unrelated employer. When using Turbo tax to calculate the maximum I can contribute to my solo 401K, it doesn't appear to be factoring in the 401k deferral made with my W-2 employer, as entered on the W-2 details. I contributed the maximum ($22,500 + $7,500 catchup) as a W-2 employee, however, when I select "Maximize Contribution to Individual 401k" TurboTax indicates I can defer $30,000 (elective deferrals/catchup) and then the total amount it indicates needing to be contributed by the tax filing deadline appears to contain the additional amount in employer matching (profit sharing) contributions. Thus, it appears to be making the amount to contribute by the tax filing deadline (and affecting the amount of income tax owed) incorrect by $30,000. I believe I can only do the employer profit sharing portion (e.g., net profit less deductible portion of SE tax) which would mean subtracting $30k from the amount Turbo Tax is indicating I need to contribute by the tax filing deadline. However, I would think this is then inaccurately reporting my tax liability on my income tax return. Any direction is appreciated!