Address for what? Where to mail federal paper returns
https://www.irs.gov/uac/where-to-file-paper-tax-returns-with-or-without-a-payment
What is the address to mail my 2018 return ? I live in Maryland
https://www.irs.gov/filing/where-to-file-paper-tax-returns-with-or-without-a-payment
You will have to mail your MD return in a separate envelope:
Here is a link to the MD site where you can look up the address
https://taxes.marylandtaxes.gov/Individual_Taxes/Taxpayer_Assistance/Contact_Information/
https://taxes.marylandtaxes.gov/Individual_Taxes/General_Information/Filing_Methods/Paper_Filing/Mailing_Instructions.shtml