What this notice is about Important information about your Form W-7A, Application for Taxpayer Identification Number for Pending U.S. Adoptions. Your application was incomplete. What you need to do Complete the response form at the end of this notice and provide the specific information or supporting documentation requested within 60 days of the date on the notice. When you receive a Social Security number (SSN) for this child, complete the response form with the SSN and mail it using the information provided on the form. If you prefer, you can fax your information to the fax number in the notice using either a fax machine or an online fax service. Protect yourself when sending digital data by understanding the fax service’s privacy and security policies. You may want to If you have additional questions, call the IRS at 737-800-5511 or 267-941-1000 (for international calls). Frequently asked questions How long is an ATIN useful? An ATIN is valid for 2 years. However, if you don’t have a SSN for your adoptive child, you can request a one year extension. For more information, see instructions for completing a Form W-7A, Application for Taxpayer Identification Number for Pending U.S. AdoptionsPDF. Tax publications and information Form W-7 A, Application for Taxpayer Identification Number for Pending U.S. AdoptionsPDF Full list of tax forms and instructions Adoption Taxpayer Identification Number Need Help? You can authorize someone to contact the IRS on your behalf. See if you qualify for help from a Low Income Taxpayer Clinic. If you can’t find what you need online, call the IRS number at the top of your notice or letter. If you didn’t receive a letter or notice, use telephone assistance. If you can't resolve the penalty on your own, contact Taxpayer Advocate Service, an independent organization within IRS.