I am filing tax return for my son, who had summer internship income from NY, and also income from home state MI.
I can technically do the NY forms, but I don't understand one thing:
On form 203 page 1, there is one column for total (fed) income and one column for NY income. On page 2, the tax is calculated as NY tax on the whole income then multiplied by the ratio of NY income to total income. Why isn't it just NY tax on NY income? The tax calculated by the first way is $150 more than the second way.
Thanks if you have any answer to this.
ZG
