If you have not received your refund, go to www.irs.gov. On the front page there are several buttons, one of which says “Where is My Refund?” Click on that button and follow the steps as directed. You should be able to see from there if your refund is in process or has been paid. If the page says still processing, check back the next day. IRS website only updates once a day so checking multiple times is a waste of your efforts.