How can I find out about pension benefits for myself as my husband will be retiring soon?

Start a divorce case. That will give you subpoena power to get the information and a court case to apportion the pension between you and your husband.

First, try calling the employer's human resources department and asking them about you and your husband's retirement plan. They may give you the information you need. If not, you can get it from your husband in the "discovery" phase of the divorce process. He needs to give it to you, but you may need a lawyer to make him see that if he won't give it to you easily. This communication is confidential attorney client &/or work product privileged.

Contact the Plan Administrator. Generally there are no benefits to you until the member dies or a divorce Judge creates your interest in a Final Judgment.