Based on the few facts you posted, I will assume that you have been denied by both the ALJ and the Appeals Council and are ready to file in the Federal District Court. From this point, it is all paperwork prepared by your lawyer, or by you if you do not have a lawyer. There will be no more hearings to attend.
You argue, based on the evidence submitted to the ALJ and reviewed by the Appeals Council, that you are legally entitled to the benefits (very brief explanation). These cases are decided on summary judgment motions filed by both sides.