Take a look at this article in the Miami Herald that came out Tuesday about income tax withholding
The article states that one of the “Stimulus” bills that Congress passed will result in a new withholding schedule effective April 1. It may result in less being withheld from your paycheck. The article warns, however, that you may be among those who will, as a result, “under-withhold” and that you should be concerned about that.
The article refers to an on-line withholding calculator, but the website address the article gives is incorrect. Here is where you should start on the IRS website.
Thanks to Carol for bringing this to my attention.