Refund of 8% Maryland withholding for non-residents?

[Paul Winka]

Can't believe there was nothing on BP about this -- how do I get this withholding amount refunded to me? Quick back story is I am a Missouri resident that sold a Maryland property in June 2023, I've e-filed my federal and MD tax return as of the first week of April 2024. Does that mean the $2362.42 paper check is on its way and I don't need to take action? 

If the check is not on the way, I don't know what I am supposed to do. I see this Maryland form here that seems to be appropriate, but I am not eligible to file it because it mentions that it should not be used if filing it after 12/01/2023. So then what? 

I've tried calling around to sources that should have the answer and haven't gotten anywhere yet.