MA requires transaction dates on securities that aren’t provided - how do I handle this?

[massbear]

I live in Massachusetts. I have an account through a national brokerage that includes bond funds. These bond funds deal in mortgage-backed securities. I have a 1099 with 598 sales last year in this account with no acquisition date (there is no federal reporting req't to report acquisition date for these types of securities.)

My TurboTax State version is bringing these up one at a time and insisting on acquisition dates, which I do not have. 

How can I ignore/bypass these in trying to do my review? Each one takes 15 seconds or so to process if I try to enter 'Var' or 'Unk,' and it will take forever to process 598 transactions. Help!