The total on the summary/menu page includes boxes 1, 3 & 8 too. (also any forms K-1 have entries that can can add into it).
There are also box values that can reduce the amount...but depends on which box was used. boxes 11, 12, & 13 are treated differently...as is accrued interest.
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IF it is showing way-over the proper amount..there is a possible bug you've hit upon.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
