1. No you can't net the amounts.
2. Yes, you can report gambling losses on the OK state return under itemized deductions. It is limited to $17,000.
If you don't have enough to itemize, you will take the standard deduction instead.
Ok does require you to file a tax return. 2024 Form 511-NR Oklahoma Individual Income Form for Nonresidents and Part-Year Residents Packet & I... states:
Nonresident - Except as otherwise provided for in the Pass-Through Entity Act of 2019, every nonresident with Oklahoma source gross income of $1,000 or more is required to file an Oklahoma income tax return
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