In order to determine the tax rate (basis) for each employee, a W-4 is required to be completed prior to the issuance of the first payroll check. This form can be downloaded at no cost at www.irs.gov. In addition, an I-9 is also required and this can also be downloaded at no cost at www.uscis.gov
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Federal, State, and Disability taxes are employee paid. You do not have to match it. They also pay the 6.2% FICA and 1.45% Medicare just like you do.
You will have FUTA to calculate at .8% but it`s only paid on the first $7,000 worth of earnings PER employee.
Depending on the state you live in, there may be employer contributions to ETT and SUI. New businesses in California are usually at 1% for the Training Tax [ETT] and, until they`re rated, start at about 3.4% for the Unemployment Tax [SUI].
Don`t forget workers compensation. You can find information on rating by going to http://www.wcirb.com
If you need help, let me know. It`s what I do.