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You will see your gambling losses reflected on line 16 of Schedule A. The total of your itemized deductions will show on line 12 of your Form 1040.
You would see your gambling winnings reflected on Schedule 1, line 8a. The total of your other income will appear on line 8 of your Form 1040.
As long you verify that those entries are correct, your gambling winnings and losses are correctly stated on your tax return. If the income tax is not what you expect to see, there would have to be another reason for that outside of your gambling winnings and losses.
I suggest you compare your return line by line with your return from the previous year to see where there are differences and investigate them one by one to find out why they changed.
