For the following reaction, identify the Lewis acid and the Lewis base and draw the curved arrow mechanism. 
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The process by which a married couple combines their income and deductions to file a single tax return.
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Total income minus specific deductions, used to determine taxable income on an individual's tax return.
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The portion of an individual's income that is deducted for Medicare, which is a form of health insurance typically for individuals aged 65 and older.
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A Flexible Spending Account, which is a special account used for setting aside pre-tax dollars for eligible healthcare and dependent care expenses.
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