Depending on how you filed (by mail or electronically) you'll be able to trace the status on the IRS website, www.irs.gov, either now or soon.
If you filed electronically, you can trace it any time after 1 week following your e-file.
If by mail, you need to wait 4 weeks.
When you go on the site, you'll need name, SS #, and the expected refund amount as entered EXACTLY on your tax return.
Matt in NY