Earlier this year the US Supreme Court ruled that Maryland had to issue full tax credits–including the county add-on tax–to individuals facing double taxation (typically, Maryland residents who earned income taxed in other states). Kay Bell in Don’t Mess With Taxes today noted that the Comptroller of Maryland (Maryland’s state tax agency) has created a webpage for those impacted.
The webpage gives the basics on this, and notes that the Comptroller’s office will not be contacting impacted taxpayers. There’s a link within to a web page on the Wynne Case and the Comptroller’s office has a new form (From 502LC) designed for this specific situation. There’s also a detailed FAQ.
I also need to point out this decision likely impacts other states and jurisdictions. Other states with “add-on” local taxes include Indiana, Ohio, Kentucky, Michigan, Missouri, New York, and Pennsylvania. However, where this impacts taxpayers is residing in a state that does not allow a tax credit for local taxes (Indiana, Iowa, Kentucky, Maryland, North Carolina, and Wisconsin are some of the states so identified) and/or residing in a local jurisdiction that does not allow such a credit (jurisdictions in Ohio, Pennsylvania, Michigan, Missouri, Delaware, and Indiana have been so identified). I have not looked at each state/local jurisdiction to see who is impacted. If you think you’re impacted–remember, you would need to live in a jurisdiction that hasn’t been allowing such a tax credit and have taken such a tax credit on a recent tax return–you should contact your tax professional.