Expired J-1, do i need file form I-601??

You're right, you don't need a waiver if you entered legally but overstayed, or if you worked without authorization. I am assuming that you didn't overstay on PREVIOUS visits to the U.S. by 180 days or more -- but your overstay on THIS visit is forgiven if you are getting a green card through marriage to a U.S. citizen.

It sounds as though you should be eligible to adjust based on the limited facts you have provided. You should sit down for a consultation with an immigration to ensure you are eligible.

You should consult with a lawyer before you waste money filing a form you don't have to file and possibly get your petition denied due to ineligibility. J visas have extra complications, too.

standard "245(a)" adjustment of status is often messed up by periods of unlawful presence and working without authorization EXCEPT with immediate relative spouses etc. This protects the US Citizen spouse. That;s why you don't fit for the waivers. Even though you are almost ready with the paperwork, go see an immigration lawyer to review it for an hour. And make sure there is nothing in your history that needs dealing with. If you want to do it all yourself without help, read the I-130 instructions for spouses very very carefully. The requirements are different. Good luck.!!