I am told that from April-Dec of 2020 New York is not giving tax payers a credit for taxes paid in NJ if they worked from home from April -Dec. Therefore taxpayers are facing double taxation? Maybe this will get settled with the courts. Any suggestions on how a tax payer should withold for state purposes going forward? The plan is to work from home at least until July.
What are the authoritative sources you were told to use? It's more a problem for someone who telecommutes from NJ for a NY employer than the other way around.
The governing sections are still NY Tax Law §620 and 20 CRR-NY 120. Pay special attention to the section that deals with sourcing rules.
For good measure, here's the latest guidance in relation to COVID-19 from NY (which really doesn't say much): https://www.tax.ny.gov/pit/file/nonresident-faqs.htm#telecommuting
Still an AllStar