Originally Posted by sck5
SAVE YOUR PA TAX RECEIPT!!!!! Maryland charges 6% but gives a credit for tax paid to another state. That is, if you paid 5% somewhere else you only owe the difference (i.e. 1%) to Maryland.
Call them up and ask them.
I will call after the holiday. But it appears that Maryland only gives credit if the other state would give reciprocal credit. So I also need to call PA and ask them a totally hypothetical question on behalf of a fictitious Maryland residant - and try to get their answer in writing.