I'm not from MD and not familiar with their specific procedures. The above is a generic state answer. But, an internet search reveals there may be a special (and easier) form for claiming a refund. You may be able to avoid the TT fee for an extra state return.
<a rel="nofollow" target="_blank" href="
https://forms.marylandtaxes.gov/18_forms/MW506R.pdf">https://forms.marylandtaxes.gov/18_forms/MW506R...>
