Thanks on the business trip taxes. I think this is commonly called jock tax.
This gets messy with dyanmic income stream. For example, raises, bonues, and RSU vesting window. I'd imagine would require proper prorating for all income components. And NYS can easily trigger an audit to create a miserable process even if all the prorating is proper.
And depends how far one wants to go to claw non-resident earnings. What about dividends from NYS sources. Say a mutual fund with some NYS sources.
