How much do I deduct from my employee's pay check for Social Security? I am in McHenry County Illinois if that matters. Thanks.

Go to PaycheckCity.com - Employee Self-Service Tools To Better Manage Your Paycheck (http://www.paycheckcity.com).
First you need to register, no charges. It has many useful calculators. If you want to find out what the pay check will be then you can use this link:
PaycheckCity.com - Sign in to use Advanced Features (http://www.paycheckcity.com/netpaycalcreg/netpaycalculator.asp)

First select the year and State and then enter your income and deduction info.