The address at 333 West Pershing Road with Mail Stop 6055 S-2 is the internal routing address for the Business Master File (BMF) Entity unit inside the IRS Kansas City Submission Processing Center.1Internal Revenue Service. 21.3.3 Incoming and Outgoing Correspondence/Letters The mail stop is what tells the mailroom to route your envelope to that specific unit rather than into the general processing queue for paper returns. You’ll see it most often on instructions for business entity correspondence, including Form 8822-B, when the business’s principal office is in one of the eastern or midwestern states the Kansas City center serves.
What the BMF Entity Unit Handles
The BMF Entity unit works business entity cases and certain change-of-information filings for businesses whose principal office is in designated states, including New York, Illinois, Florida, Pennsylvania, Ohio, and about 20 others.1Internal Revenue Service. 21.3.3 Incoming and Outgoing Correspondence/Letters “BMF” is the IRS’s Business Master File, the internal record for every business taxpayer. When that record needs to be updated, the paperwork lands with an Entity unit, and Kansas City’s covers the eastern and midwestern share of the country.
Mail Stop 6055 S-2 is not an address you invent or guess at. It appears on IRS instructions and notices when the agency wants your response to reach that unit directly. If your notice or form instruction includes it, use it exactly as written.
When to Use This Address
The most common reason a taxpayer sends mail to 333 West Pershing Road, Mail Stop 6055 S-2 is to file Form 8822-B, the Change of Address or Responsible Party form for business entities.1Internal Revenue Service. 21.3.3 Incoming and Outgoing Correspondence/Letters If your business changed its mailing address, business location, or responsible party, and your principal office sits in one of the states served by Kansas City, this is the unit that updates the record.
Other written correspondence about business entity information can also be routed here when the IRS specifies the mail stop in its instructions or in a notice you’re responding to. The rule of thumb: if the letter you received names Mail Stop 6055 S-2, reply to Mail Stop 6055 S-2. If it doesn’t, use whatever address the form instructions or notice specifies instead.
How to Format the Envelope
The Kansas City facility is large and houses many units. A missing or misspelled mail stop sends your envelope into general sorting, which adds time. Address correspondence to the BMF Entity unit like this:
Internal Revenue Service
333 W. Pershing Road
Mail Stop 6055 S-2
Kansas City, MO 64108
Include a clear return address that matches your entity’s address of record. If you’re responding to an IRS notice, attach a copy of the notice to your response. Add a short cover letter stating the purpose of the submission along with the entity’s legal name, address, and EIN. Keep copies of everything you send, including the cover letter and the carrier’s tracking receipt.
Street Address Versus P.O. Box
333 West Pershing Road is a physical street address, not a P.O. Box. Private delivery services like FedEx, UPS, and DHL cannot deliver to P.O. Boxes, which is why the IRS publishes street addresses for its submission processing centers separately from the P.O. Boxes used for regular USPS mail.2Internal Revenue Service. Submission Processing Center Street Addresses for Private Delivery Service (PDS) Kansas City is one of three centers that accept private-carrier deliveries; the other two are in Austin, Texas and Ogden, Utah.
For BMF Entity correspondence specifically, use the mail stop line whether you’re sending through USPS or a private carrier if the IRS notice or form instruction directs you to it. The mail stop is what gets your envelope to the right desk once it’s inside the building.
Business Name Changes
A related reason people write to Kansas City is a business name change. The simplest route is to check the name-change box on your next annual return. Corporations filing Form 1120 mark the box on Page 1, Line E, Box 3. S-Corporations filing Form 1120-S mark Page 1, Line H, Box 2. Partnerships filing Form 1065 mark Page 1, Line G, Box 3.3Internal Revenue Service. Business Name Change A corporation should also have amended its articles of incorporation with the state where it was formed.4IRS. Instructions for Form 1120-S (2025)
If you’ve already filed the current year’s return, send a written notification to the IRS address where you filed. The letter must be signed by an authorized person: a corporate officer for corporations, or a partner for partnerships.3Internal Revenue Service. Business Name Change Include the EIN, old name, new name, and effective date of the change. If you want written acknowledgment back from the IRS, ask for it explicitly in the letter.
The Kansas City Center in Context
The building at 333 West Pershing Road is a 1.14-million-square-foot facility built in 2006 to consolidate IRS operations in the Kansas City metro area into one processing hub.5General Services Administration. Internal Revenue Service, Kansas City, MO It handles intake, sorting, scanning, and data extraction for millions of paper returns each year and has absorbed business-tax-return work previously done at other facilities. Mail Stop 6055 S-2 is one address inside that building, tied to one unit within it.
What Happens If You Use the Wrong Address or Skip the Mail Stop
Sending correspondence to the wrong IRS address, or leaving off the mail stop when the instructions call for one, doesn’t cause your filing to be thrown out. The IRS will eventually route it internally. But “eventually” can mean several additional weeks, and while it’s in transit the agency’s system may show no record of your submission. For a change of address or responsible party, that delay can mean IRS notices continue going to the wrong place in the meantime.
The fix is simple: read the instructions on your form or notice, copy the address line by line onto the envelope, and keep a tracking receipt. When the instructions include Mail Stop 6055 S-2, include it on its own line between the street address and the city. That single line is what separates a same-day delivery from a document that sits in a general sorting queue.