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There is still a problem with form 2210. It does not add line 12b from 1040 to the standard deduction amoount that is entered on line 7 of form 2210 and I cannot manually change the number. Also, can someone explain the Capital Gains Tax Computation Smart Worksheet? Do I just equally split the total capital gain/loss for the year and enter it for each period or do I have to put the exact amount for each period?