Well, if you are retired, or live in an income-taxing state I disagree with @leeloo somewhat to a lot.
1) IF you are retired, the $$ in box 12 are critical in determining your MAGI for determining how much of your SS is about to be taxed...and in determining if your Medicare Premiums (Parts B&D) are subject to extra premiums the next year.
2) If you live in an income-taxing state, the $$ in box 12 are usually required to be mostly-to-all added to your state's income and are usually considered taxable in your state.
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IF you imported that 1099-DIV form, try deleting it entirely and entering it manually using the 1099-DIV form that Vanguard provides on their website....usually within a consolidated 1099-B PDF file. That particular error shouldn't happen that way, but perhaps there is something else that imported that is causing the problem.
Also, don't put zero's in any boxes.....IF there is not a valid positive value in a box, leave it empty/blank.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
