I resided in Maryland but worked in Colorado last summer

I know that income is taxable in both states. But when I compared the Turbo tax liability in Maryland to the Maryland ifile system, the Maryland Turbo tax return results in a liability that exceeds the ifile Maryland version by the amount of the Colorado liability. I completed both CO and MD in turbo tax.  It doesn't look like the proper 502 CR for MD is being created in Turbo Tax. Thanks!