Oh and even if the amended return shows no change you should still file it. The IRS might see the whole 1099B as profit and not know you had a loss.
And If you have a net loss for the year you can only deduct 3,000 (1,500 MFS) max on your tax return. The rest you have to carryover to next year. You have to report the carryover every year until it's used up. You can't skip a year.
But If you have a negative AGI or negative taxable income it will show up on 1040 BUT it won't reduce the carryover to the next year.
