The IRS are in violation of tax law passed by congress; when I was audited going back to 2013 they gave me 30 days from the date of their notice to me to respond but that notice was back dated so I only had 14 days from the actual day the notice was received, to respond.
They then sent a second notice asking me to sign away my rights under tax law for a speedy resolution of my tax issue because they did not have time to resolve that issie and needed another 18 months to review my audit. Further if I refused to give up mu rights they intended to simply ignore my answer to the audit they had no time to consider and find against me on the audit and began collection efforts and adding pentalty and interest.
They advised me if I refeshed to sign away my rights my only recourse was to sue them in tax court.