A Designated Official (DO) is a president, vice president, CEO, CFO, COO, secretary, treasurer or managing member of a business or entity such as a C corporation, S corporation or limited liability company (LLC). This person must be authorized to legally bind the business or entity and a current employee who received a W-2 for the most recent tax filing year. By registering as a DO, this person will have full access to the corporation’s tax information and can act on the corporation’s behalf within business tax account. Currently, corporate officers or managing members of a single member LLC don’t qualify for DO registration. Designated Officials registration To register as a Designated Official: Gather the documents you’ve filed with us, which could include: Employer identification number (EIN), which can be found on an EIN confirmation or verification letter or on a federal tax return The corporation’s federal tax return (Form 1120, U.S. Corporation Income Tax Return or Form 1120-S, U.S. Income Tax Return for an S Corporation) The business or mailing address from the most recent IRS records Create account or sign in to your existing business tax account. Follow the steps to register as a Designated Official. When you receive the PIN, activate it in your business tax account. Multiple designated officials per business tax account can ensure continuity in the event of death or disassociation of the initial DO, but each DO must register separately. A DO may remove another DO from the account. Each DO must revalidate annually. Find more on the features available in a business tax account.