The $30,000 in severance is taxable by MI as you both lived and worked there. Assuming none of it was received after you moved to VA, none of it is taxable by VA.
Income from IRAs and retirement plans is taxable only by your resident state. Thus, your $70,000 IRA-to-Roth conversion while living in VA is taxed only by VA, not MI. (As far as I can tell from VA tax instructions, VA has no special treatment for this type of income. If special treatment is available, TurboTax VA should catch it.)
Note that you will file "part-year resident" returns with both MI & VA.
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