It depends. States have different rules about taxing employees who moved out-of-state due to the pandemic. We'd have to know specifically which states.

A clue that may help is to look at what's being reported in the state section of your W-2 (boxes 18-20), assuming you told your employer relocated.

If you told your employer you moved and you still had tax withheld from your old state, then you probably have to pay tax in both states. If you have separate state wages and withholding for two states, then you probably can file part-year returns and report only income attributable to each state.

Job is in North Carolina then I moved home to Maryland. I didn’t try to hide that I moved to MD but I didn’t inform the payroll dept that I moved. So withholding was only for NC. 

For now Maryland will not attempt to tax an employee who is working remotely at residence in MD for a company in another state.  You only need to file NC resident return for 2020.  However, if you are allowed to continue to work remotely and you take steps to permanently move to Maryland, 2021 filing could be different (e.g. part-year NC and Part-year MD or resident MD and Non-resident NC).  

Here is a link with how different states are handling work from home.