Ok, my W-2 exceeds $250,000 and I need to pay NIIT 3.8%.
And AGI is far away from $609,350. The tax rate must be 35%. Total is 38.8%.
38.8% from $2,460 is $954.48, less than $1,705-$675=$1,030, which Turbotax adds to my taxes.
Actually, I played with numbers in Box 3, and I see the following picture.
Box 3 Additional tax Rate
$100 $35 35%
$500 $229 45.8%
$1000 $408 40.8%
$2000 $816 40.8%
$2500 $1045 41.8%
$3000 $1224 40.8%
$3500 $1453 41.51%
$4000 $1632 40.8%
$4500 $1860 41.3%
$5000 $2040 40.8%
The numbers look wrong. Is it a bug in Turbotax?
