After you file

Here's how to phone the IRS to speak to a live agent.  I'll also tell you how you can contact the IRS Taxpayer Advocate Service if necessary.

IRS:  800-829-1040  hours 7 AM - 7 PM local time Mon-Fri

Listen to each menu before making the selection.
 
First choose your language. Press 1 for English.

  • Then do NOT choose the first choice re: "Refund", or it will send you to an automated phone line.
  • Instead, press 2 for "personal income tax".
  • Then press 1 for "form, tax history, or payment".  
  • Then press 3 "for all other questions."
  • Then press 2 "for all other questions."  It should then transfer you to an agent, but there is likely to be a long wait.
I usually use a speakerphone so I can work on something else while waiting.

If you don't get good info or results from the IRS, you could contact the IRS Taxpayer Advocate Service to see if they can assist you.   They are more willing to help if you have a hardship.   At the following IRS website, find the USA map and click on your state, and it will give you the number of your IRS Taxpayer Advocate.

http://www.irs.gov/uac/Contact-a-Local-Taxpayer-Advocate

Also see this article for more info on how the Taxpayer Advocate Service works::
http://www.irs.gov/taxtopics/tc104.html