If you did not have any gambling winnings, just
enter 12/31/2017 when asked for the date.
Entering a date won't, by itself, create any taxable income.
You probably ought to check your tax file to make sure there isn't a Form W-2G: Certain Gambling Winnings that is adding gambling winnings to your return.
Use the "Delete a Form" tool to see what forms are in your tax file, state and federal. If there is a W-2G, remove it along with any
associated worksheets.
See: How do I delete forms in TurboTax Online?
After
deleting the W-2G (if there is one), log out of the program. When you
log back in, use the Delete a Form tool (List of Forms in My Return) to confirm it has been removed from your return.
