It's the "Tax-Deductible" check. Click on the little icon that appears at the end of the headings
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(just above the vertical scroll bar), and you'll see ALL of the columns available. You can toggle each of them visible or invisible. In your case, "Tax-Deductible" is checked. Uncheck it, and it will vanish from your screen.
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You can also rearrange the columns any way you wish by clicking and dragging a heading to a different location..