When in jail do your child support arrears increase while you are incarcerated?

Yes. Your obligation isn't stopped until a court orders it. If your in for the long term then you need to go back to court to seek relief. If you don't and it keeps piling up then its something that may last the rest of your life if the state that has jurisdiction has interest tacked onto arrears.

Yes, you can file though court to show no income and have what you owe reduced but yes it keeps adding up