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The IRS has finalized the new Form 4506-C (October 2022), which is currently available on the IRS website. We have attached a prefilled form for your review.

The Internal Revenue Service (IRS) has extended the deadline for transitioning to the new Form 4506-C. Both versions of Form 4506-C will be accepted through February 28, 2023. Effective March 1, 2023, the newly published Form 4506-C will be the only form we will accept.

Please ensure you complete the form as you intend it to be processed. Lines 5 through 8 must be complete before the taxpayer signs. The exception to this is the following items that we have prefilled for your convenience.

  • Line 5aii, IVES participant ID number
  • Line 5aiii, SOR Mailbox ID
  • Line 5b, Customer CIC File Number
  • Line 5c Unique Identifier (if directed to use by CIC Staff)

Updated 4506-C Form

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