121 financial mailing address

Here is the mailing address for the Internal Revenue Service (IRS) for filing Form 121, Statement of Foreign Financial Assets:

Internal Revenue Service P.O. Box 802405 Chicago, IL 60680-2405

Please note that this address is only for filing Form 121, and not for other types of tax returns or correspondence. If you have any questions or concerns, you can contact the IRS directly at 1-800-829-1040 or visit their website at irs.gov.