The purpose of Form W-4 2018 Printable is to provide employers with information about the employee's tax withholding preferences. This form is filled out by employees and allows them to indicate the number of allowances they wish to claim, which affects the amount of federal income tax withheld from their paycheck. By accurately completing this form, employees can ensure that their tax withholding aligns with their anticipated tax liability, preventing them from either owing significant taxes at the end of the year or receiving a large refund. The Form W-4 2018 Printable also includes additional sections for employees to provide information on any additional amount they would like to have withheld from their paycheck, as well as for employees who may be exempt from federal income tax withholding altogether. It is important for employees to update their Form W-4 whenever there are changes in their personal or financial circumstances to ensure accurate tax withholding throughout the year. Overall, Form W-4 2018 Printable serves as a tool to help employees effectively manage and adjust their tax withholdings in accordance with their individual tax situations.