For information regarding when and whether to return Form W-9 to the requester, call the IRS. To see if you are a U.S. person, please see How to Determine Your Tax Status. If you are a student or a self-employed person, you might also find the form useful because most credit cards do not ask for information about your tax account. In most cases, you must provide a valid document to get a current address on your tax return. Also, you must have a valid form of identification (e.g., a card, Social Security card, or passport) to be allowed to use the mail. To change your address on your tax return, go to Forms and Publications. See Form W-9 for more information. For Form W9 online Tampa Florida, click to access your form. Visit Report a Problem (Report a Problem) If I am a U.S. taxpayer and an applicant for credit card service calls, what should I do? There is an option to speak to a customer service person. If the caller tries to use the call center to apply for credit card service, it will ask the applicant to provide Social Security number, date of birth and taxpayer identification number. We don't require you to provide the Social Security Number. If an applicant cannot provide the IRS-issued TIN for your person, they will not be admitted. If an applicant provides the TIN for a person they are not filing a return for, the IRS will only require to see TIN to determine this. In order for an applicant to be admitted into the call center to provide you your return or application and for the call center to have the necessary information from you, they have to provide you with a valid form W-9 and have them verified by the IRS. Call the Call Center Number at the Main Number. If you have any questions, you can reach the call center at . I filed my tax return and I don't have my TIN.