Before you begin to calculate withholding for your employee or independent contractor, be sure to choose the total amount that matches your pay cycle. Information on pension and annuity payments that are subject to federal income tax withholding.Attach copies of your pay stubs for the last two months and proof of any other income. Please fill out the form below. Below are links to help you with your income taxes whether you want to file your taxes online or just need a tax form with some information. This is a one-size-fits-all form this is used for many different purposes so some of this information. Follow the prompts to speak to a child support representative in the Orange County office.