Please post in comments or e-mail me and let me know:
1. Name of software (URL would be great)
2. Whether there's a specific option for "state filing status is different from federal"
3. If not, whether you can submit different returns by just going back and clicking on the other status, or whether you have to re-enter the entire return
4. Most importantly: if the software doesn't have a specific option for people with different filing statuses, find out if the software is going to require you to pay twice in order to submit a state return that isn't based off of the federal one, or is going to require an additional step like printing it out the state return and mailing it
If you are unable to tell how your software would handle a filer with two different filing statuses, please call or e-mail the support folks to ask.
When doing so, please do me a favor and simply ask them how to enter a tax return for a filer who is filing as married for state purposes and as single for federal purposes.
Then make note of whether the representative was immediately aware that this refers to same-sex couples in Massachusetts, or whether the person was ignorant of the Massachusetts issue and told you that the statuses can't be different, or told you that it's illegal to file with two different statuses.
Once you've determined whether they were aware of the issue before you called, try to find out how willing they are to solve the issue. Will they refund the duplicate filing fee if their setup required one? Try to determine whether the system has an honest glitch that they're apologetic about, or whether they're unconcerned. It should be possible to get these answers without having to actually be a married couple.
If will follow up with some sort of overview of "good" and "bad" companies on my site, and will also follow up with the companies.