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Official form guide
Form 15105-SP: 15105 (SP)
Internal Revenue Service Form 15105 is a response form for notices that must be mailed within 30 days of the notice date. It collects the employer identification number, business name, tax period(s), address changes, and contact phone numbers.
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IRS Form 15105-SP - 15105 (SP)
Internal Revenue Service Form 15105 is a response form for notices that must be mailed within 30 days of the notice date. It collects the employer identification number, business name, tax period(s), address changes, and contact phone numbers.
Risk Radar
Scan points- 1Missing the 30‑day mailing deadline results in non‑compliance.
- 2Leaving the employer identification number blank
- 3Omitting the business name field
- 4Failing to list the tax period(s) covered by the notice
- 5Not providing a new address when the address has changed
Plain English
Form 15105 is used to reply to an IRS notice. You enter your employer ID, business name, the tax period the notice covers, any new address, and phone numbers. Then you mail the form in the provided envelope or to the address on the notice within the required time.
Submission Date
- Filing date: 2022-10-20 22:10:23
- Preparation window: collect IDs, supporting records, and signatures in advance.
- Final review: verify names, dates, and required fields before submission.
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What this form is for
- Use this form when you must respond to a notice and mail the response within 30 days of the notice date.
- Do not use it when you must provide a breakdown of obligations by abstract number, which this form does not include.
- Check Form 720 instead when a breakdown of obligations by abstract number is required.
Form selector
Use this form or another form?
Need to provide abstract-number tax breakdown
Form 15105 does not include abstract-number breakdown
✓ Confirm the notice requests abstract-number breakdown
Responding to a notice that supplies its own envelope
The notice includes an attached envelope for mailing
✓ Verify the envelope is attached
Changing business address as part of the response
Address change fields are on Form 15105
✓ Ensure new address is entered correctly
Deadline or filing window
The filing window opens when the IRS notice is issued. The response must be mailed within 30 days of that notice date. No extension is mentioned in the source.
Checklist
What you need before filling it out
Employer identification number
Employer Identification Number (EIN) · Form 15105
Business name
Legal name of the business · Form 15105
Tax period(s)
Applicable tax year(s) or quarter(s) · Form 15105
New address (if changed)
Updated street, city, state, ZIP · Form 15105
Primary phone number
Main contact telephone number · Form 15105
Before you submit
- 1Enter the employer identification number exactly as issued by the IRS.
- 2Write the business name as it appears on official records.
- 3Specify the correct tax period(s) for which the response applies.
- 4If the address has changed, fill in the new street, city, state, and ZIP code.
- 5Provide a primary phone number and indicate the preferred time of day (a.m. or p.m.).
- 6Provide a secondary phone number if desired and indicate its preferred time of day.
- 7Review the completed form for any blank required fields.
- 8Place the form in the attached envelope or, if using your own, address it to the location indicated in the notice.
How to file this form
- 1Complete all required fields on Form 15105.
- 2Verify that the employer identification number, business name, tax period(s), address (if changed), and phone numbers are entered accurately.
- 3Insert the completed form into the IRS‑provided envelope or seal your own envelope with the correct address from the notice.
- 4Mail the envelope within 30 days of the notice date.
- 5Keep a copy of the mailed package for your records as proof of filing.
Known limitations
- 1Form 15105 (sp) does not provide a breakdown of obligations by abstract number on Form 720
- 2Form 15105 (sp) requires the response to be mailed within 30 days of the notice date
- 3Form 15105 (sp) requires that, when using a personal envelope, the package be sent to the address shown on the notice
Field map
Compact field-by-field guide
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->Form 15105 (sp) is the June 2017 edition (revision 6‑2017); the source provides the catalog number 93123U and the IRS website but does not indicate a newer version.
What changed or needs a fresh check
- Edition date — confirm the revision reads 6‑2017.
- Catalog number — confirm it is 93123U.
- Mailing address — Not stated in the official source.
- Signature — Not stated in the official source.
Quick Facts
Downloads
Sources
- SRCForm p.1 — response must be mailed within 30 days of the notice date.
- SRCForm p.1 — send response by mail using the attached envelope.
- SRCForm p.1 — includes fields for employer identification number, business name, tax period(s).
- SRCForm p.1 — includes fields for new address if you changed domicile.
- SRCForm p.1 — includes primary and secondary phone number fields with best contact times.
- SRCForm p.1 — notes no breakdown of obligations by abstract number on Form 720.
Common confusion points
Do I have 30 days to mail the response?
The notice states a 30‑day mailing window.
→ Count 30 days from the notice date and mail before the deadline.
Where do I send the completed form?
The form says to use the address on the attached notice or the envelope provided.
→ Verify the address on the notice before mailing.
Do I need to include a breakdown of taxes?
The form notes no breakdown of obligations by abstract number on Form 720.
→ Leave the breakdown sections blank as instructed.
Can I submit the form electronically?
The form instructs to send by mail.
→ Use the provided envelope; electronic submission is not indicated.
What if I changed my address?
The form includes a field for new address and a phone line for assistance.
→ Fill the new address field and confirm the change with the IRS phone number.
Do I need to provide a secondary phone number?
The form provides optional fields for a secondary phone and best contact times.
→ Fill only if you want a backup contact method.
Workflow map
Related forms and next steps
Before
Current
After
Often used with
⚠ If something goes wrong
- Form 720 – no breakdown of obligations by abstract number
Questions about IRS Form 15105-SP
What is IRS Form 15105-SP used for?
Form 15105 is used to reply to an IRS notice. You enter your employer ID, business name, the tax period the notice covers, any new address, and phone numbers. Then you mail the form in the provided envelope or to the address on the notice within the required time.
What information does IRS Form 15105-SP require?
The form gathers the employer identification number, the business name, the tax period(s) involved, a new address if the address changed, the primary phone number, and the secondary phone number.
When is IRS Form 15105-SP due?
Send the response by mail within 30 days from the date of the attached notice.
Where do I file IRS Form 15105-SP?
Mail the completed form within 30 days to the address shown on the notice; if you use your own envelope, send it to the address indicated in the notice.
How do I complete IRS Form 15105-SP?
First, enter the employer identification number and business name. Next, record the applicable tax period(s) and, if applicable, the new address. Then provide the primary and secondary phone numbers with preferred contact times. Finally, place the form in the attached envelope or your own envelope and mail it to the address listed on the notice.
Do I have 30 days to mail the response?
The notice states a 30‑day mailing window. Count 30 days from the notice date and mail before the deadline.
Where do I send the completed form?
The form says to use the address on the attached notice or the envelope provided. Verify the address on the notice before mailing.
Do I need to include a breakdown of taxes?
The form notes no breakdown of obligations by abstract number on Form 720. Leave the breakdown sections blank as instructed.
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