The process was relatively laid back and easy. I met with two partners in the tax service line, who were from my desired office location. I talked to each one for 30 minutes. During the whole time, they maybe asked one or two behavioral questions. The rest of the time was just us chatting about hobbies, and me asking questions about their time at Deloitte. Make sure you have a long list of questions prepared! If you can get the partner talking about themselves, you'll be golden. They love nothing more than to go on about everything that they've accomplished. Before the interview, they required me to take a personality quiz. This has absolutely no bearing on whether or not they offer you the job (my recruiter told me), it's just for fun and to get to know you a little bit before the partners sit down with you.