If you are Self-employed are you withholding your taxes?

So you are self-employed, and, your income is not being reported to the IRS on a W2 but on a 1099-MISC form, which means that neither federal income tax or self-employment taxes are being withheld from your checks, and it also means that you are responsible for getting those funds over to the IRS on a regular basis, quarterly in fact.  Basically, you are required to pay