"If you filed an electronic return, expect a refund and signed up for direct deposit, the IRS says you should get it within 21 days of filing, as long as there are no issues with your return," said CNBC Select. For those who chose to receive a check instead of direct deposit, tack on "about one week" to that timeframe, said NerdWallet.

Discover the basics of how the IRS tax refund works. Learn strategies for maximizing them and tips on how to use them wisely.