Q. Just want to know where VT provides the same guidance.
A. They don't, nor do most other states.
Note that @TomD8 's suggested method is essentially the same a NY's. And, that's usually the answer to that question, in this forum. You want to identify "VT source income". It's what you got paid for the day you actually worked in VT.
Here's an interesting article on that general subject. You pay tax to VT and take a credit on your NJ return. It usually comes out even for you, except for the hassle and expense of of filing a 2nd state return.
http://money.cnn.com/2013/06/28/pf/taxes/business-traveler-tax-threat/
