About Aphthous Ulcer: These small sensitive painful craters in the mouth are common canker sores. There are many possible causes of apthous ulcers and frequently the cause is unknown. See also: sub-topics
The IRS phone number for individuals is (800) 829-1040. Businesses can call (800) 829-4933. Hearing impaired individuals can contact the IRS using TDD at (800) 829-4059. Operating hours are between 7 a.m. and 10 p.m. in your local time zone. After hours, a recording will direct you. Have all your paperwork in front of you when you call.
Telephone Assistance for Individuals who believe they may be a victim of Identity Theft: No Tax Administration Impact-Did not receive a notice from the IRS. Toll-Free 800-908-4490 (Automated and live assistance).Hours of Operation: Monday â Friday, 7 a.m. â 7 p.m. your local time (Alaska & Hawaii follow Pacific Time).elephone Assistance for Individuals who believe they may be a victim of Identity Theft: No Tax Administration Impact-Did not receive a notice from the IRS. Toll-Free 800-908-4490 (Automated and live assistance). Hours of Operation: Monday â Friday, 7 a.m. â 7 p.m. your local time (Alaska & Hawaii follow Pacific Time).