It is interesting to go and inform you to take notes on the firm that you call or interview you will be visiting. The employer will be happy to know that you are interested in a minimum accounting firm. During the discussion, try to put your strong points forward and answer the questions calmly. If you do not know the answer to a question, feel free to say and do not try to invent something.
If you need time to think about something, tell it to your interlocutor. Although you see, the recruiter is just your friend. You want to show him that you might be a good asset to the company and that it is lost in the process if you do not choose. If you have previously applied for the job, mention it, it will inform the recruiter that you actually be interested in the accounting firm you want to work.