I filed part year taxes for Colorado after doing my federal. There is another form that is used to calculate which part of your income is taxable in Colorado (DR 0104PN) and it needs to be included with your CO return. I was able to file online with Colorado and Maryland but not my federal. Of course I have received or paid the states what they say I owe them, but federal has not sent me my refund yet...probably because I mailed paper copies to the IRS address that covers my current residence. I'm sure that once the IRS has distributed all of the virus stimulus checks they will get right on with sending out refunds for what we overpaid last year.

I sure do hope next year is simpler, but highly doubt I have tuned my withholdings to get back to the minimum refund/overpayment status I was at before leaving CO.