First off, sorry you're having issues with getting your brothers returns filed.
You can always file on paper if you have to. the other thing is there might not be a state filing requirement. A lot of states don't tax pensions. If there is no state withholding to get a refund on and no state filing requirement then you don't need to file it.
If you do need to file because he has taxable state income, then just file it on paper. Remember to send certified
