How many should you claim on w-9 if you are single with no dependents?

On a W-9 form for income tax purposes, if a person is single with no dependents, they are allowed to claim one person only, that being themselves. Some people prefer to have the government withhold a little extra from their paychecks so that they do not end up paying in at the end of the year. Since there are no dependents and no husband/wife attached to the joint tax return, it should be obvious that the only person who could claim would be you. As far as the information you put on a Form w-9 is concerned, you would need to put all taxpayer information on the form, and make sure you indicate that you are single and without dependents on your return, as the IRS needs valid information from the person they are receiving their return from.