Turbo Tax Deluxe said no need to file K-1 if Part II Box 12 is checked entirely within my Roth IRA but IRS is sending CP2000

I responded to the first CP2000 saying tax was due but got a second one saying thanks for your comment but pay up.  

My interest in the partnership referenced in the CP2000 is entirely within my Roth IRA and is so indicated in Part II, box 12 of the K-1 submitted by The Ishares S&P GSCI Commodity -Indexed Trust.  Turbo tax omitted the K-1 omitted the K-1  because the brokerage account and earnings are held by my retirement plan and  I should not have to report any of the K-1 information on my personal tax return unless withdrawn from the Roth.  IRS did not respond directly to my point of law, only reiterated I owe $125 plus interest.  This pertains to Turbo Tax for 2017 and 2018.  I will try to see what Turbo Tax says for 2019 once I get it downloaded.