What this notice is about We have important information about your child’s Adoption Taxpayer Identification Number (ATIN). We need more information to process your 1- year extension request of your child’s ATIN. What you need to do Complete Form 15100, Adoption Taxpayer Identification Number (ATIN) Extension Request PDF, included with your notice within 60 days, and provide: The reason you need an extension. The reason you can’t get a Social Security number (SSN). The status of your adoption. Original signatures of adoptive parents, or; The SSN for your child if you received it. Detach notice stub, mail it with Form 15100 in the envelope provided. 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 Call us at the number listed in your notice. See additional information on Adoption Taxpayer Identification Number. Frequently asked questions What do I need to do? Send us the missing information so we can process your 1-year extension. How long is an ATIN valid? An ATIN is valid for 2 years. If you don’t have an SSN for your child, you can request a 1-year extension. For more information, see instructions for completing a Form W-7 A, Application for IRS Adoptions for IRS Individual Taxpayer Identification Number. Reference tools Publication 1, Your Rights as a Taxpayer Full list of tax forms and instructions 是否需要帮助? 您可以授权他人(英文)代表您自己联系国税局。 查看一下您是否有资格获得低收入纳税人诊所的帮助(英文)。 如果在网上找不到您所需的内容,请拨打您的通知或信函顶端的国税局电话号码。倘若您在网上未能找到所需信息,请拨打通知或信函顶部的国税局电话号码。倘若您未收到信函或通知,请使用电话协助。 如果您不能自行解决罚款问题,请联系纳税人辩护服务处,这是国税局内部的一个独立机构。