Before you fax
The IRS says these CAF fax numbers may change without notice, so use the official instructions link as the final check.
Official source checkedwww.irs.gov ↗
IRS · verified routing workflow
Fax IRS Form 8821 from outside the United States
Official IRS international CAF routing for Form 8821 tax information authorizations.
Send this fax
Use the verified number below to prefill the sender. You can still review it before payment.
Use number 855-772-3156 →MORE VERIFIED ROUTES
Start with the task — not the fax number.
Fax IRS Form 3911 from Florida, Texas & Austin-routed states
Austin Refund Inquiry Unit
Open workflow →Fax IRS Form 3911 from California and western states
Fresno Refund Inquiry Unit
Open workflow →Fax IRS Form 3911 from New York
Brookhaven Refund Inquiry Unit
Open workflow →Fax IRS Form 3911 to the Kansas City Refund Inquiry Unit
Kansas City Refund Inquiry Unit
Open workflow →Fax IRS Form 2848 to the Memphis CAF Unit
Memphis CAF Unit
Open workflow →Fax IRS Form 2848 to the Ogden CAF Unit
Ogden CAF Unit
Open workflow →