Are you referring to a contribution or withdrawal?

withdrawal

there is an error in TurboTax:  Keogh earnings cannot be untaxed in Mass as stated by Fed TT, and then taxed in the Mass State TT forms

Zbucklyo: thank you for your answer. It is the same as my understanding of the situation. My problem is actually with TT which has a serious flaw in its Fed forms. This was supposed to be corrected over a year ago. The error persists making me believe each year that I have missed something in understanding what I need to do.