Generally, taxpayers who filed their returns online by April 15 should have received their refund check within the last week and taxpayers who mailed in their returns should expect to see their refund check within six weeks of the date their return was received by the Internal Revenue Service (IRS).

If you have not yet received your refund check, you might be wondering where it is. There is an easy search you can perform yourself.

You can check the status of your refund online at www.irs.gov. Once your are on the site, you can click on “Where’s My Refund” and enter your Social Security Number and the exact whole dollar amount of your refund to see if your check was returned to the IRS as undeliverable, update your mailing address, see when your refund is supposed to be sent out, and/or request a replacement check if you haven’t not received it within 28 days of the date the IRS mailed it. If you receive your check more than 45 days after the date on which you filed your return, you will also receive interest on the amount from the IRS. The interest rate changes quarterly, but the current rate is 4%.

But please note that you can only check the status of your refund online after 72 hours if you e-filed your return or after three-to-four weeks if you mailed your return. Also note that you cannot check the status of you refund online if you filed an amended tax return. If you filed an amended tax return and have not received your refund within eight weeks of your filing date, you can check your status by calling 1-800-829-104.