You will need to file for Maryland and Michigan. In general, you pay tax to the state where you worked when you earned the money. For 2020, some states had special rules in place if you worked from home due to Covid-19. Michigan is not one of those states.
You will have to determine your state residency (What is my state residency status? - TurboTax). Because you were not in Michigan long, and lived with your parents, it does not seem you became a MI resident, but it is based on many factors including your intent.
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