Should I do an NDIA or set up a regular agreement?

A company that I am thinking about hiring to help with my tax issues wants me to get into a thing they call an NDIA, it is a nondisclosure installment agreement. This is where I do not disclose any of my financial information. I am wondering if I could get a lower payment plan if I do disclose my information to the IRS myself. I owe the IRS about 62 thousand dollars( I sold a business and Las Vegas winnings) and now have a monthly income of about 5200 and about ~4600 of that is going out in bills every month. What do you think about my situation and what I am thinking about?