You have to report the carryover every year until it's used up. You can't skip a year. Even if you don't report it on your return you have to reduce it by the 3,000 (1,500 MFS) when you carry it over to next year. You can't choose when to use it.
This is from the IRS Pub 550 page 66....
"When you figure the amount of any capital loss carryover to the next year, you must take the current year's allowable deduction into account, whether or not you claimed it and whether or not you filed a return for the current year. "
IRS Pub 550 https://www.irs.gov/pub/irs-pdf/p550.pdf
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.
In the Online version you have to save your return with all the worksheet as a pdf file to your computer to see the Capital Loss carry over worksheet. There might be 2. There is a Capital Loss Carryover Worksheet showing the carryover from the prior year and the current amounts. Then there is also the Capital Loss Carry Forward worksheet showing the amount transferring over to next year.
