You must report the full amount of gambling winnings. Report any Iowa tax withheld on IA 1040, line 63. Gambling losses may be reported as an itemized deduction on Schedule A, but you cannot deduct more than the winnings you report.
Gambling losses: Gambling losses are deductible on IA 1040, Schedule A, line 25, only to the extent of gambling winnings reported on IA 1040, line 13. The gambling loss amount entered on IA 1040, Schedule A, line 25, shall only include losses from wagering transactions, and does not extend to business expenses incurred in the trade or business of gambling.
Married Separate Filers:The spouse to whom the income was paid must report that income.