It all depends on how much income you receive (interest, dividends, cap gains, etc.) that do not have taxes withheld from them. If its only a few hundred dollars then you probably don't have to make estimated payments. But of its several thousand then you should make estimated payments. Usually the IRS requires you pay at least 90% of the tax you owe to avoid under payment penalty. Just because the forms are not pre printed does not mean you do not have to make estimated payments. If you do not have the 1040-es form you can make online payments on IRS.gov and your state website.
