You're allowed to respond to a notice yourself, and for a trivially simple one that can be fine. But DIY responses fail in predictable ways: they explain instead of document, they answer questions the IRS didn't ask, they miss the penalty-relief request entirely, and they go out without anyone checking the IRS's own math. The reviewer on the other end isn't grading effort — they're matching your evidence against their records.
Composite example: a client receives a CP2000 proposing roughly $34,500 — about $28,800 of additional tax on $120,000 of "unreported" stock proceeds, plus a 20% accuracy-related penalty. The brokerage had reported gross proceeds without basis. Actual cost basis: $105,000, making the real long-term gain $15,000 and the correct additional tax about $2,250 at the 15% capital gains rate. The response — a corrected gain calculation with brokerage statements attached and a request to drop the penalty — resolved the matter for a small fraction of the proposed amount. Outcomes vary case by case and no result can be promised, but this pattern of inflated proposals is the rule in basis-related notices, not the exception.
Column 1Who talks to the IRS
DIY responseYou, on hold on the general line
CPA representationYour CPA, via practitioner priority channels
Column 1What the IRS sees first
DIY responseA letter written under stress
CPA representationA documented response in the format reviewers expect
Column 1Risk of saying too much
DIY responseHigh — every extra detail is on the record
CPA representationLow — the response is scoped to the question asked
Column 1Account visibility
DIY responseWhat the notice tells you
CPA representationFull IRS transcripts: what they received, assessed, and applied
Column 1Penalty relief
DIY responseRarely requested, often missed
CPA representationEvaluated on every engagement
Column 1Deadlines
DIY responseTracked on your fridge
CPA representationTracked on a professional deadline calendar
| DIY response | CPA representation |
|---|
| Who talks to the IRS | You, on hold on the general line | Your CPA, via practitioner priority channels |
| What the IRS sees first | A letter written under stress | A documented response in the format reviewers expect |
| Risk of saying too much | High — every extra detail is on the record | Low — the response is scoped to the question asked |
| Account visibility | What the notice tells you | Full IRS transcripts: what they received, assessed, and applied |
| Penalty relief | Rarely requested, often missed | Evaluated on every engagement |
| Deadlines | Tracked on your fridge | Tracked on a professional deadline calendar |
There's also the phone problem. Calling the IRS yourself means long hold times on the general line and a conversation where everything you volunteer goes in the file. Under power of attorney, we use practitioner channels, and we say exactly what the case needs said — nothing else.