@Nellisardelli I didn't see your reply. If you never stepped foot in NYS, you do not have to allocate your wage income even if from a NY employer. Most NY employers will continue to withhold, even with Hayes, so you'd have to apply for the refund. This is because the witholding guidelines are different than the personal income tax guidelines.
You will need to continue to file NYS nonresident returns if you have any other source income or loss in the State such as flow-through income/loss, rental income or loss from a NY property, etc.
If you moved in 2018, and haven't stepped foot in NYS since, you shouldn't have any issues with your domicile change. Best of luck, and enjoy CO!
Kristine L. Bly, EA Private Client Services / Residency / Tax Controversy
Partner, Cohen & Company
