I completed my first Roth conversion which includes 401k and traditional IRA contributions and investment gains (deductible and non-deductible contributions). I have not started taking any distributions. I received my 1099-R for the conversion showing (hypothetical) converted amount of $10,000. After completing IRS Form 8606, $9,000 is taxable with IRS and $1,000 is not taxable. Massachusetts is asking for “Other Contributions Previously Taxed by Massachusetts”. Should I enter $1,000 here? Or is there some other calculation that needs to be considered?
