Only Pennsylvania. MD and PA have reciprocity, so you only have to file a tax return with the state you live in, unless you have non-wage MD income such as rental property or a business. You would also need to file a Maryland return if MD income taxes were mistakenly withheld from your pay.
If your only MD-source income is W2 income, and only PA taxes were withheld, do not list Maryland anywhere in Turbo Tax. Say No to making money in another state....
