Paycheck Checkup
The Tax Cuts and Jobs Act changed the way tax is calculated.
The IRS encourages everyone to perform a “paycheck checkup” to see if you have the right amount of tax withheld for your personal situation
For the first time since 1987 the US Government has made a major change to the US Tax Code. These changes could spell trouble for you come tax time if you don’t take a moment to review your Federal Tax Withholding. The IRS and NIA are here to help you with some online tools. 
Take a look at the below links for help calculating your appropriate tax withholding, and remember that NIA is here to help you as well!