What this notice is about We couldn't locate the return you said was previously filed. What you need to do Read the notice carefully to determine the required form we need. If you have a copy of the original return, please re-sign it and send it to us. If you don't have a copy of the return, visit Forms & Instructions to get a new form or call 800-829-3676. Fill out the Contact Information section of the notice, detach it and send it to us with your re-signed copy or completed form so we receive it by the due date on the notice. You may want to Review your records to ensure we didn't send the original return back because of missing signatures or missing information. Frequently asked questions What happens if I don't respond by the due date? We may consider your return delinquent and begin collection enforcement to secure the return. Who do I call for assistance? For assistance with your business return, call 800-829-0115 or for assistance with Form 990-T, Exempt Organization Business Income Tax Return, call 877-829-5500. 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）。 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，请联系纳税人权益服务处，这是国税局内部的一个独立机构。
