Not to compound your fears or anything OMT, but there is a worrisome scenario here. You report your gross winnings with an offsetting deduction for your losses. So your return shows a wash. But you have the burden of establishing your losses in fact occurred to sustain the deduction. If challenged, and if you have no detailed records/betting slips, etc. to support the losses, your deduction could be disallowed. But they might "take your word" for the winnings leaving you with a serious tax liability. Suppose you made an average of just 2 $110 to win $100 bets per day. That's 730/year. If you won exactly half your games, your winnings would be $36,500. Your losses would be $40,150, but you could only deduct $36,500 since losses can only be deducted to offset winnings. But, if your losses were not deductible b/c you couldn't adequately document them, then you'd owe tax on $36,500. Penalties and interest could apply and in the nightmare scenario failure to pay estimated taxes might lead to additional penalties!!
This would seem to be an extremely harsh result, and you would think that if they accept your figure for winnings that they would accept your figure for losses, but at any given time there are "hot button" issues for the taxing authorities that they focus on. I have no idea if deduction of gambling losses is one of them, but going forward you might think of a better record keeping system.