The Internal Revenue Service (IRS) has updated the income-tax withholding tables for 2018 to reflect changes made by the new tax law. OSD payroll systems have been updated to reflect the new rates for employers to use during the 2018 tax year. You will see this change on your February paycheck, and you can view the new tax table here https://www.irs.gov/pub/irs-pdf/p15.pdf.
Employees do not need to do anything at this time. If you are wanting to complete a new W4 form, the IRS has not released a new 2018 W4 form. You can still complete a 2017 W4 form if you would like to make any changes to your withholdings.
Questions about this new IRS withholding table may be emailed to the Payroll Office at Helpfirstname.lastname@example.org.