Because you worked in Maryland, you must pay income tax in Maryland- in this case as a nonresident since you were still a Texas resident until June. The option of paying Virginia or Pennsylvania tax withholding only applied in terms of state tax reciprocity- if you are a RESIDENT of Virginia or Pennsylvania (or DC) but work in Maryland, you can choose to file and pay only in your resident state for wages earned in Maryland. Using you sister's mailing address does not absolve you from paying the nonresident Maryland income taxes. If you had Pennsylvania withholding you would have to file a PA nonresident return to claim the PA tax withholding.
You will have to file a Maryland Part-Year return and allocate nonresident for the time you were a Texas resident and resident income for the income after you became a Maryland resident.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"
