IRS Individual Inquirie: 1-800-829-1040
IRS Business Inquiries: 1-800-829-4933
Refund Status Information: 1-800-829-4933
Report Identity Theft: 1-800-908-4490
Identity Verification: 1-800-830-5084
Request Tax Transcripts: 1-800-908-9946
Offset Information (e.g., refunds applied to debts): 1-800-304-3107
Taxpayer Advocate (Assistance for unresolved issues): 1-877-777-4778
Holds Department (Suspended refunds, etc): 1-866-897-3315
Collections Department: 1-800-829-7650
Local IRS Taxpayer Assistance (appointments): 1-844-545-5640