I suspect that :
1) the retirement plan is x'd in box 13 of your W-2 box if the company has a qualified pension plan, adn you worked for them.
2) Also, the Box 13 "x", is, or should be x'd if you have any contributions to a company retirement plan noted in box 12...either a 401k, or 403b..or several other plan types noted there......even $1 contributed during 2019 , and that qualifies as having a plan at work
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
