Form 8802, Application for United States Residency Certification
https://www.irs.gov/individuals/international-taxpayers/form-8802-application-for-united-states-residency-certification-additional-certification-requests
Electronic Payment 877-824-9110 (within the United States only, toll-free) 304-707-9792 (inside or outside the United States, not toll-free)
877-824-9110 (within the United States only, toll-free)
304-707-9792 (inside or outside the United States, not toll-free)
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