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.
It is best to contact the IRS with your questions so that you prepare your taxes accurately. The IRS has an automated machine to help you with common issues, but if you want to talk to an IRS agent in person you need to call during their office hours, which are from 7 a.m. to 10 p.m. your local time.ind your local IRS office by clicking on your state on the map on the IRS website (see Resources). Do this if you want to go to your local IRS office and speak to an agent face-to-face.