Before you fax
The IRS says these fax numbers are for Form 3911 only; confirm your state before sending.
Official source checkedwww.irs.gov ↗
IRS · verified routing workflow
Fax IRS Form 3911 from Maine, Maryland, Massachusetts, New Hampshire or Vermont
Current IRS Form 3911 refund-trace routing to the Andover Refund Inquiry Unit.
Send this fax
Use the verified number below to prefill the sender. You can still review it before payment.
Use number 855-253-3175 →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 →