I am filing my tax return for 2021 and I moved to Maryland during 2021. In total I am a Maryland part year resident for 4 months.
My Maryland state income tax was withheld from my paycheck by my employer every two weeks during 2021. I found out now that I owe around $1200 local and state income tax to Maryland, but I am confused why I am charged an interest ? The tax filing due date is April 18th, 2022 and it is still February 2022. I tried using the interest calculator on their website and even that said I do not owe interest if the tax filing due date is April 18th and I file my tax before that. Was there a different state tax filing date for Maryland ?
