The required advance payment of a current liability that is not already being withheld for, such as investment income, capital gains, alimony, or rent.
Related information about estimated tax:
- Estimated Taxes
 Oct 31, 2012 ... Estimated tax is the method used to pay tax on income that is not subject to   withholding. This includes income from self-employment, interest, ...
 
- Form 1040-ES (2012) - Internal Revenue Service
 May 25, 2012 ... Legislative actions may impact your estimated tax liability. Household ...   estimated tax. Use this package to figure and pay your estimated tax. If ...
 
- Estimated Tax
 Aug 21, 2012 ... Top Frequently Asked Questions for Estimated Tax. Is an S-Corporation required   to pay quarterly estimated tax? How do I know if I have to file ...
 
- Estimated Taxes: How to Pay Your Estimated Taxes Quarterly
 Learn how to calculate your estimated tax payments. Estimated payments are   due at least every quarter. Tips for calculating the right amount of tax, plus ideas ...
 
- Estimated Taxes: How to Determine What to Pay and When ...
 If so, you're safe—you don't need to make estimated tax payments. ... If you   answered "no" to all of these questions, you must make estimated tax payments ...
 
- Federal Tax Refund Estimator – Tax Tools • 1040.com – File Your ...
 Gifts to charity. Job expenses. Other expenses. Estimated tax payments. Child   and dependent care expenses. Residential energy improvement. Other taxes   paid ...
 
- Estimated Tax Payments - Will You Owe - SmartMoney.com
 Jan 30, 2012 ... When you owe estimated taxes, Uncle Sam expects a check 4 times a year and   that may be you if any of the following applies to your situation.
 
- Estimated tax payment due dates
 Feb 2, 2012 ... You can either pay all your estimated tax with this first payment or pay it in four   equal installments due on: 1st payment: April 17, 2012; 2nd ...