The IRS is encouraging people to check their withholding to ensure that they have the right amount of tax withheld from their paychecks following recent tax law changes.
If you have children or dependents, and your household includes two or more jobs, and have itemized deductions or have high income or complex tax situations, make sure you visit the IRS Withholding Calculator to perform a “paycheck checkup” as soon as possible.
This YouTube video explains How to use the IRS Withholding Calculator.