Yes, people are starting to receive their refunds. You can check the status of your refund on the IRS webpage, Where's My Refund?
https://www.irs.gov/refunds
Also, you can check the status of your refund via phone. The toll-free phone number to check your Federal refund status is 1-800-829-1954. Automatic service is available every day of the week, 24 hours per day, and you can check on your refund in either English or Spanish. Or you can call 1-800-829-4477to reach the IRS TeleTax System and check the status of your tax refund.
If you are being affect by the new law, PATH Act because you claimed Earned Income Tax Credit and/or Additional Child Tax Credit, the earliest you will receive your refund is the week of February 27th.