MD resident until 2007, then moved and rented residence until 2023, when sold.

Lives in PA, employed in PA, only had rental losses each year so never filed MD return.  Had over $200K in losses never claimed (PA doesn't allow it) to offset 'gain' on sale.  

Forms 505 and 505NR convert ALL income to MD income (makes NO sense).  Can't seem to get any help ANYWHERE and telephonic hearing is tomorrow.

Any experts out there know what form should be used and/or how this is reported?