AmyC - I don't know if this will help, but [even after paying the $20.00!] TurboTax wouldn't allow me to file the Maryland Form 502 electronically - because on that Form I overwrote Line 11 (to reflect Taxable Social Security for just the period of Maryland residency) and Line 13 (to reflect Military Retirement Income for just the period of Maryland residency).
All income during the period of Virginia residency - including Taxable Social Security and Military Retirement Income - was counted on Line 12 of the Maryland Form 502.
I'm not sure why TurboTax didn't like that presentation on the Maryland Form 502 - it's how the Maryland Form 502 instructions indicate Subtractions From Maryland Income should be reported for Part-Year Maryland Residents.
Thanks again for looking into the Virginia calculation.
@Me
