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Official form guide
IRS Form 12203 is a Request for Review of Appeals used by taxpayers who received an IRS notice proposing adjustments of $25,000 or less for a tax year and wish to appeal the decision.
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IRS Form 12203 is a Request for Review of Appeals used by taxpayers who received an IRS notice proposing adjustments of $25,000 or less for a tax year and wish to appeal the decision.
Plain English
This form lets you ask the IRS Appeals Office to look again at a proposed tax change of $25,000 or less. You fill it out, explain what you disagree with, sign it, and send it back in the envelope that came with the IRS notice.
Submission Date
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Need to authorize a representative to speak on your behalf
Provides legal authority for an attorney, CPA, or authorized agent
✓ Verify representative’s name and signature
Need to submit a power of attorney for your appeal
Required when a representative will act without you present
✓ Attach completed form with signatures
Want to request a review after receiving a formal Deficiency Notice
This is the appropriate form for a review of adjustments $25,000 or less
✓ Ensure the notice reference is included
The form does not specify a filing deadline. No timing guidance is provided in the official source, and no extension rules are mentioned.
Checklist
Taxpayer name
Printed name as on tax return · Usually found in the tax return header
Taxpayer identification number
SSN or EIN · Listed on prior tax filings
Tax period(s)
Tax year(s) the adjustment applies to · Indicated on IRS notice
Disputed element
Description of the item you disagree with (e.g., filing status) · Stated in your explanation section
Reason for disagreement
Detailed explanation of why you disagree · Written in the reason box
Representative authorization
Completed Form 2848(SP) if a representative signs · Form 2848(SP) attached
Field map
General Info
2 items
Full legal name and taxpayer identification number (SSN or EIN).
Current mailing address.
Details
2 items
Complete all applicable sections of this form according to the official IRS instructions.
Enter the relevant dollar amount if this form involves tax calculation.
Certification
1 items
Read and acknowledge any certifications required by this form.
Signatures
1 items
Sign and date. Unsigned forms cannot be processed.
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Fillable formOpen in Editor->Current edition is Rev. 3‑2020 as shown on the form header; the source does not indicate a newer version.
Quick Facts
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Can I use this form if the IRS adjustment is $30,000?
The form only covers adjustments of $25,000 or less.
→ Verify the adjustment amount on the IRS notice; if over $25,000, use a different appeals procedure.
Do I need to wait for a Deficiency Notice before filing?
The form is for requesting a review before a Deficiency Notice is issued.
→ Confirm you have an IRS letter proposing the adjustment and have not yet received a Deficiency Notice.
Is a Power of Attorney required to file?
Only needed if a representative signs; otherwise not required.
→ Check who is signing; attach Form 2848 (SP) only when a representative signs.
Can I file this after I have paid the disputed tax?
The form is intended before payment; after payment you may need other procedures.
→ Ensure the request is submitted prior to paying the amount shown on the notice.
Do I have to send the form by fax?
The source provides a fax number but does not require fax; mailing is typical.
→ Check the address on the IRS notice; use mail unless instructed otherwise.
Will the IRS automatically approve my disagreement?
The form initiates an informal conference; approval is not guaranteed.
→ Expect a conference outcome; do not assume automatic reversal.
Workflow map
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⚠ If something goes wrong
This form lets you ask the IRS Appeals Office to look again at a proposed tax change of $25,000 or less. You fill it out, explain what you disagree with, sign it, and send it back in the envelope that came with the IRS notice.
Taxpayers who have received an IRS notice proposing adjustments of $25,000 or less for a tax year and want to request an Appeals review must file Form 12203.
The form collects the taxpayer’s name, ID number, mailing address, phone, tax form number, tax period, the specific item(s) you dispute, and your reason for disagreement, plus signatures.
Return the completed form in the envelope provided to the address shown in the heading of the IRS notice.
Enter your personal and tax information in the top fields, then list each element you disagree with and explain why. Sign and date the form; if a representative signs, attach a completed Form 2848. Place the form in the supplied envelope and mail it to the address printed on the IRS notice.
Providing false or incomplete information can lead to fines, possible criminal prosecution, and denial of credits or deductions, increasing the tax owed.
The form only covers adjustments of $25,000 or less. Verify the adjustment amount on the IRS notice; if over $25,000, use a different appeals procedure.
The form is for requesting a review before a Deficiency Notice is issued. Confirm you have an IRS letter proposing the adjustment and have not yet received a Deficiency Notice.
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