irs phone number customer support
To contact the IRS, call: 1  Customer service -- 800-829-1040. 2  Lost IRS check -- 800-829-1954. 3  Refund status -- 800-829-4477.  Forms and publications -- 800-829- 1 3676. Questions about refunds and offsets to IRS liabilities -- 800-829-1954.  Taxpayer advocate service -- 877-777-4778.