All cash winnings above $600 are taxable by U.S. law, and Lucky Day reports all cash winnings above $600 to the U.S. Internal Revenue Service (IRS). If you win more than $600 in cash prizes, you will be sent a W-9 form to use in completing the 1099-Misc tax form.
If you have specific questions about taxes and your Lucky Day winnings, you will need to speak with your tax professional for more information.