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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?
Check Refund Status
Please answer the following questions to confirm you are ready to receive your refund status. Answer the following questions to find out why your refund is late.