If someone used my information to open accounts in my name while I was incarcerated what should I do

The moment you knew about the fraud or should have known about the fraud, you had an obligation to notify the bank in writing.  For example, if you were released on a Tuesday and your mail was sitting at home noting the fraudulent transactions, you had an obligation to notify the bank on Tuesday. If you did not, then only alternative is going after the culprit who normally has no money. You can bring criminal charges but that may or may not help get you the lost monies. Ed Dimon