After you file

I received my federal return an the stimulus payment but never did get my Maryland State refund..I looked it up on line an it said my return was processed on March 10th 2020..An that I was mot getting it that I would receive a letter stating why..I have not received no letter .My question is how did the IRS Process my return on March 10th 2020 when I didn't file my taxes until March 11th 2020..There is some shady **bleep** go on

.I also used Turbo Tax.Never had a problem  until this year..An the way I am reading everyone has been having problems..