Capital losses can only be used to offset capital gains in a given year; there is no limit to the amount of a net capital losse for a year, but that can only be applied against taxable capital gains in other years
Generally, if you had an allowable capital loss in a year, you have to apply it against your taxable capital gain for that year. If you still have a loss, it becomes part of the computation of your net capital loss for the year. You can use a net capital loss to reduce your taxable capital gain in any of the three preceding years or in any future year.
More detailed information about the rules regarding carrying a net capital loss back or forward:Capital losses can only be used to offset capital gains in a given year; there is no limit to the amount of a net capital losse for a year, but that can only be applied against taxable capital gains in other years
Generally, if you had an allowable capital loss in a year, you have to apply it against your taxable capital gain for that year. If you still have a loss, it becomes part of the computation of your net capital loss for the year. You can use a net capital loss to reduce your taxable capital gain in any of the three preceding years or in any future year.
More detailed information about the rules regarding carrying a net capital loss back or forward: