Guide
Most IRS answers fail on paperwork, not on law: the right document that never arrived, the original that can't be replaced, the ten extra documents that buried the one that mattered. This is the discipline, once, for every letter.
Number your pages ('page 2 of 5'), and keep the sent packet — your copy, the receipt, the tracking — in one folder per notice. Months later, in a phone call, 'I sent it on March 3, certified, article number ending 4417' ends arguments that 'I'm pretty sure I mailed it' cannot.
The free decoder tells you what the letter means and when it is due. The Kit is the doing: response letters for every notice family, the penalty-relief scripts, the payment-plan and Offer in Compromise reality checks, and the proof habits that keep a sent letter from becoming a lost argument.
Get the IRSLetterDecoded Kit — $39
One-time payment. No subscription. Education only — we are not a tax firm, and this is not tax advice.
The IRS accepts fax responses on most notices — the number is printed on yours — and a fax confirmation page is real proof of arrival. For statutory deadlines (hearings, Tax Court), certified mail's postmark rule is the stronger protection. The Kit maps which channel fits which clock.
With disputes and explanations, yes — short, factual, item-by-item. With a simple payment or a signed agreement form, the form itself is the letter.