It usually takes 5-7 working days for Maryland to process a Refund for an E-Filed Return. From past experience, they are sometimes a bit behind in updating their "Where's My Refund" phone line and website. Also, they are usually a bit slower to process returns at the beginning of the filing season.
I would suggest that you double check that TurboTax shows your Maryland Refund as being Accepted by clicking here: TurboTax Refund Tracker.
If the TurboTax Refund Tracker shows that your Maryland Return has been Accepted, I would give it another day and then check their website again for your status: Maryland Income Tax Refund Information.
