PatriciaV's reply does not apply because it overlooks the fact that you are a shareholder in the S corp, not a partner, and you are not self-employed. Deposits to your solo 401(k) must be made by the S corp, reported on the S corps tax return. Your elective deferrals are required to have been reported in box 12 of your W-2. The only entry permitted in TurboTax for your individual tax return is to enter the amounts from box 12 of you rW-2 into box 12 of TurboTax's W-2 form, no other entries in TurboTax.
