Need to fax IRS Form 4506-C? This complete 2026 guide covers every fax number by campus, how to complete the form correctly, and the common mistakes that cause the 30–40% rejection rate.
Frequently Asked Questions
What is the fax number for IRS Form 4506-C?
There are three fax numbers depending on your assigned IRS campus: Austin (844-249-6238), Kansas City (844-249-8128), and Ogden (844-249-8129). IVES participants are assigned to a specific campus during enrollment — always fax to your assigned campus.
How long does it take the IRS to process a faxed 4506-C?
Faxed Form 4506-C requests are processed within 2–3 business days of IRS receipt. The IRS internal standard is 72 hours from receipt, excluding weekends and federal holidays.
Can individual taxpayers fax Form 4506-C themselves?
No. Form 4506-C can only be submitted by enrolled IVES participants (mortgage lenders, banks, credit unions, and similar institutions). Individual taxpayers sign the form to grant authorization, but the participating institution is the one who faxes it to the IRS.
What is the difference between Form 4506-C and Form 4506-T?
Form 4506-T allows any individual or business to request transcripts for their own use. Form 4506-C is exclusively for enrolled IVES participants (third parties like lenders) and delivers transcripts to a secure digital mailbox rather than mailing them to the taxpayer.
Why was my Form 4506-C rejected?
The rejection rate for faxed 4506-C forms is 30–40%. Most common reasons include handwritten entries (OCR can't read them), white-out or strikethroughs, missing spouse signature on a joint return, using a form version older than October 2022, or faxing to the wrong IRS campus.