I've just started working and am consider an independent contractor, as a result, my taxes are not taken out of my check. I must do it myself and I need to know how I can get a grid that tells me how much taxes to take out of each pay check.

The tax information for wages is available in the IRS Publication 15, known as a Circular E. It provides the tables for withholding and the information on Social Security and Medicare taxes. You can download a PDF file of this publication at Internal Revenue Service.