First of all, a “Notice of deficiency” is also called a “90-day letter” and is easy to respond to … Just like any case you apply the law (Tax Code) to the facts of your case..
A key issue is that section 6213 has the effect of putting the case before the Tax Court… So any settlement must be issued by the Tax Court….An Appeals Conferee or tax counsel from treasury (IRS) is generally assigned to negotiate…
As in every case communication is an essential part of settlement..
Issue TRADING can be a key piece a settlement…The IRS prohibits that (see Circular 230)
But it’s a key part of virtually every case…
Several code sections are involved…so the following may be only a partial answer to your question…
Section 6201(a)(1) gives TREASURY (IRS) authority to assess tax shown on the tax return..
The flush material of section 6201(a) gives Treasury (IRS) the authority to gather information about the TP such as from IRS audits to assess additional tax…
A Statutory Notice of Disallowance (Stat Notice) is provided by section 6213 & is also known as a “90-day Letter” (3219N) which is required to be issued before the IRS is authorized to collect the tax reflected in the Stat Notice….
The Stat Notice gives the TP 90 days to petition the Tax Court…
Here’s some additional thoughts:
HOW DO ASSESSMENTS COME ABOUT?
In order for the IRS to collect tax the tax must be assessed .. there are generally 2 ways assessments are created…
FIRST, a self-assessed is made by the TP when the TP files a tax return reflecting a balance due…Section 6212
SECOND, an assessment is typically made after an audit if the Revenue Agent recommends an assessment…
But go for it using info from LEE’s BB you should have no trouble responding…