Anyone know if any part of a "solo" 401(k) contribution made by a sole proprietor can be deducted on a MA individual income tax return? I haven't been able to find any place for it, or any indication that any deduction is allowed. And since it is clear that MA does not allow deductions for traditional IRA contributions, SEP-IRA contributions, and Keogh plan contributions, I would not be surprised to find out that the "profit-sharing" part of a solo 401(k) contribution would not be deductible. However, MA does allow *employees* to deduct their salary-deferral contributions to a 401(k) [by virtue of MA using the W-2 Box 1 number for wages], so it wouldn't be intrinsically unreasonable to expect that sole proprietors might be able to take a deduction for the "salary-deferral" part of a solo 401(k) contribution. So is there some non-obvious way to get a full or partial deduction, or are MA sole proprietors just out of luck?
-- Rich Carreiro snipped-for-privacy@animato.arlington.ma.us