I think you can only write off 3,000 for your capital gains loss and the rest of the loss can carry over to the next year, and as many years as needed. Say you make 10k next year, you can put the rest of the loss towards that from the previous year. If you have 4K in losses you carried over from last year. You could minus it from the 10k gains you made this year and only write in a gain of 6k in your capital gains section which means you pay less tax. Double check that info.
I use gainskeeper to figure everything out. They can calculate the wash sales etc with one hit of the button. I do as many as 3,000 trades a year so I need a program to figure things out. Ameritrade offers gainskeeper for free.
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