Where do I send 3911 form I live in Washington state

From the bottom of Form 3911

 

Do not send this form to this office. Instead, please use the envelope provided or mail the form to the Internal Revenue Service center where you would normally file a paper tax return.

 

From the IRS---where to file a paper return:

https://www.irs.gov/filing/washington-where-to-file-addresses-for-taxpayers-and-tax-professionals

 

 

For Washington state:

 

Department of Treasury
Internal Revenue Service 
Ogden, UT 84201-0002