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             For this problem, there is no requirement to set off with future profits or add past losses to current year. There is no data. It is the IT law that capital gains taxes are paid by individuals and not companies. When a company holds trading instruments like bonds, shares of other companies (investment), when it sells them, in both cases of profit and loss, it is recognised in profit or loss statement. This loss is deducted from revenues and becomes Book profit or trading profit.
Revenue 10,000
Expenses 9,000
Capital Loss 2,000
Capital gain 500
PBT= -500₹
And this amount as whole will be filed as a loss and will be carried forward. This will be set off with next year’s profits if any until the whole 500 is recovered. 
In the above problem, this was not asked in the question.