The Third Party Designee option on the California Resident Income Tax Return (Form 540 2EZ) allows you to designate an individual or a business to receive certain information from the California Franchise Tax Board regarding your tax account. This can include things like notices, refunds, or copies of your tax return. Designating a third party designee can be helpful if you want someone else to handle your tax matters or if you want to keep your tax information separate from your personal mail. To designate a third party designee, you will need to complete Form 5884, Third Party Designee, and submit it along with your tax return.