You can file for divorce in the county and state you live. Once the papers are filed, you hire a process server to serve him at the jail he is incarcerated. He will have time to respond and you go from there. Unfortunately, it happens all the time
https://www.inmateaid.com/ask-the-inmate/how-can-i-get-a-divorce-from-my-husband-who-is-in-jail-at-this-time#answer
Accepted Answer Date Created: October 29,2014