can my casualty loss be more than my gross salary?

Answer 1

Your casualty loss is what it is. To find the deductible portion to put on schedule A, you subtract $100, then subtract 10% of your AGI. Your gross salary has nothing to do with it unless your salary is your entire AGI.

If your question is really, if your loss is greater than your income, do you get a refund from it, the answer is no. You subtract your total deductions (itemized or standard) and your exemptionrs from your AGI to get your taxable income - if the deductions and exemptions total more than your AGI, then your taxable income is zero.