Manage Your Business on the go with the Paychex Flex Mobile App. Enjoy easy access to your payroll, HR and other services directly from your smartphone or . Simplify payroll processing with Paychex Flex. Submit and run payroll in as few as two clicks. Learn more about the ease and convenience of online payroll. Create My Account Please provide the following information to create your Paychex Employee Services account. All fields with an asterisk (*) are required. Employees not served by Paychex Flex or MyPaychex should login here to access retirement contributions, health insurance, flexible spending accounts, and ..