My question involves bankruptcy in the state of: NY

Chapter 7 lawyer wants 1.5K additional to sue IRS. Debt from 2013, filed in 2014.

I don't fully understand the strategy, except she said it's to insure against future IRS collection efforts.

My concerns: one, is this kosher; and two, what are the unintended consequences this could have between me and the IRS in the future?