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CP59B

CP59B: Business missing-return notice — verify instructions

Prepared by TaxRZR editorial team · IRS sources checked 2026-10-29 (ET) · professional review pending · This page’s Source Notes

If your business missing-return notice is marked CP59B, preserve the B suffix when identifying it. Do not substitute the individual CP59 instructions. Confirm which return and period the IRS says are missing; this page cannot independently verify code-specific wording or response requirements.

Notice scope. For a business missing-return notice bearing the full B-suffix code. Match the business name, employer identification number (EIN), return type and tax period on the actual notice. This is not individual CP59, CP515 or CP518 guidance. Book chapters offer general recordkeeping and business context, not verified instructions for a particular business return.
Notice-specific source status. IRS sources checked October 29, 2026. A current code-specific IRS page or sample for CP59B could not be located: IRS site search returned no results and the expected notice-page addresses returned 404. Only general IRS notice and past-due-return instructions below were verified. The code-specific response form, processing window and delivery method remain unverified. Professional review pending; use your actual notice or call its IRS number.

What the IRS can do next

General IRS past-due-return guidance warns that leaving required returns unfiled can lead to IRS-determined tax, penalties, interest and delayed refunds. The precise consequences depend on the business return involved. Do not assume this reminder creates Tax Court or Collection Due Process (CDP) hearing rights; read any separate assessment or collection notice.

Use the response date on your actual business notice. No code-specific day-count deadline has been verified here.

No recently-filed waiting period has been verified for CP59B. Do not borrow the individual notices’ eight-week rule or CP518B’s processing instructions. Follow the enclosed response instructions, or call the IRS number on the notice if they are missing or unclear. General IRS guidance says to file required past-due returns even if you cannot pay in full.

Next step

Identify the missing business return and period, check filing acceptance records, and follow your notice’s response instructions. If the notice appears wrong or you recently filed, contact the IRS number printed on it before assuming no response is needed.

Steps to work through

  1. 01Compare the complete notice code, business name, EIN, return type and tax period with your records. Keep any e-file acceptance confirmation or mailing evidence.
  2. 02If the return is required and unfiled, prepare the correct return with its required schedules and signatures. General IRS guidance directs a past-due return to the location shown on the notice when you received one.
  3. 03If already filed, filed under a different name or EIN, or you believe no return is required, explain the issue using the actual notice’s instructions and enclosures. Ask the issuing IRS office what documentation it requires if unclear.
  4. 04Keep copies of the notice, return, explanation and submission evidence. Follow up on unresolved discrepancies and separately address any later notice’s deadline.

Common misreadings

  • Form 15103 is labeled Form 1040 Return Delinquency; it is not a verified response form for this business code. Use the enclosure specified by your notice.
  • Do not assume the fax number, four-week processing rule or eight-week FAQ on CP518B applies to this code.
  • These pages do not establish a mandatory CP59B → CP515B → CP518B sequence or promise another warning before action.

Read in the book

Official sources

Source status. Based on our draft book dated October 29, 2026, with IRS sources checked October 29, 2026. Professional review pending. General federal tax education, not individual tax or legal advice. Your actual notice and current IRS instructions control.
Scope. These pages cover federal IRS notices, not state tax agency notices. A federal levy of a state refund is not state-specific tax guidance. The collection ladder is an illustration, not a required sequence or a promise that another warning will arrive.