To register for a MyTax Missouri account, follow the steps to register as an “Administrator” of your Individual Income Tax or Property Tax Credit account. After clicking the “New User? Register Here” button located under the login box, select the option to register as an “Administrator.” Individual income tax and property tax credit filers will use information from their most recently filed income tax return or property tax credit claim to complete a request for access. Upon completion, a Personal Identification Number (PIN) will be mailed to the address on file. Once you receive this PIN, login to MyTax Missouri to complete your registration. (Individuals must have a prior filing history with the Department to be eligible to register as an Administrator.)