Form 8582 is actually a federal form for Passive Activity Loss Limitations. TurboTax is attaching to your Missouri return, presumably because you have passive losses.
The federal 8582 is not yet available in TurboTax (estimate date is 3/17/2022) - follow the schedule release date at Federal Forms Availability.
Some states in TurboTax have reported issues with a 8582 being attached to the state return (and blocking the e-file) even when the form was not required. Can you tell me if the form is required on your MO return? If not, there may be something we can do about it.
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