work comp.

I am from Michigan and have been drawing work comp.I have also been drawing Social Security Disability..My Social Security Disability has been reduced because I am on work comp. But I will be 65 in a few months and will be drawing Old Age Social Security, therefore my Work Comp. amount will get reduced..How can I find out what my Work Comp. will be after it is reduced when I start drawing the Old Age Social Security checks? I did work in a factory.