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I understand the computation but where is this adjustment amount coming from.

 

Foe instance in the TT example:

 

-You entered $1,000 of ordinary dividends (box 1a), $1,000 of qualified dividends (box 1b), and an adjustment amount of $100. Both ordinary dividends and qualified dividends will be reduced by $100 to $900.

 

Where is the $100 coming from -- not the W2 I assume or the 1099-DIV.  Can someone please identify where I find the adjustment amount.

Thanks