If you are an employee of a company that uses ADP for payroll and tax services, you may need to access your company's tax information in ADP in order to file your taxes or to review your tax withholding information. Additionally, if you are a business owner or manager, you may need to access your company's tax information in ADP in order to review the company's tax filing status, make changes to the company's tax withholding information, or to review the company's tax payments.