After you file

If you efiled, you can double-check with this tool to be sure the return was efiled successfully and accepted.
https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp

If that showed it was accepted, you can check the status of the Federal refund with this IRS tool:
http://www.irs.gov/Refunds

If that shows it's been processing longer than 21 days, you can phone the IRS to see if you can learn anything about the delay.

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.