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- Phone Number For IRS TAXES ISR RIS RSI SRI SIR - Internal Revenue Service
This is the main number to call the IRS (Internal Revenue Service) regarding your taxes or your refund. In addition i have provided some other phone numbers for the IRS that you might need. Calling the I R S is very easy with this toll free 800 number 
Mon Apr 14, 2008
No matter how you spell it, If you need to contact the IRS, their main phone number is:
IRS Toll Free Main Number: 1-800-829-1040
this is the main number you can call, they are open monday-friday only and i think they close at 5pm pacific time.
WHY DO YOU NEED THE IRS NUMBER?