COB Secure Web Site

Welcome to the IRS/SSA/CMS Data Match Web site

Data Match Messages

Browser Encryption Protocols Update

To meet new security standards, effective 01/16/2017, your internet browser must be using Transport Layer Security (TLS) 1.1 or 1.2 encryption protocols in order to properly access this application. Please contact your local information technology (IT) personnel to ensure your browser is compatible with TLS 1.1 or 1.2 and has it enabled.

Please Note: If you are using the latest versions of all major browsers (including: Internet Explorer version 11, Mozilla Firefox version 27 and Google Chrome version 30 or higher) TLS 1.1 and 1.2 are supported and enabled by default. Users with these browser versions should not be impacted by this change.

***Attention*** Upon logging into the Data Match Secure Website, if you do not see your EIN populated within the EIN Listing screen, please click on the Home link at the upper left hand corner of your screen. The data for your EIN should then display appropriately.

This site provides employers with an efficient process for responding to the Internal Revenue Service (IRS)/Social Security Administration (SSA)/Centers for Medicare & Medicaid Services (CMS) Data Match.

This secure Web site provides Employers, regardless of size, with information about the Data Match process, and the ability to respond to the Data Match Questionnaire via online screens, or upload and download Employer files created for the Electronic Media Questionnaire (EMQ) response method.

In order to submit your IRS/SSA/CMS Data Match response through one of these available electronic submission options, you must assign an Account Manager to register for this service. The Account Manager must be an individual authorized to access the Secure Web site, provide responses to the questionnaire, and authorize Designees, who will have the authority to respond to questionnaires using one of the following electronic options:

Direct Entry
Electronic Media Questionnaire (EMQ)
For information about the availability of auxiliary aids and services, please visit:


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