Thank you for the input.
Yes, you have to use form 4506 to get copies and even validation on previously submitted 5500-EZ (and apparently 5500-SF) forms... no information over the phone.
I used accrual because I started with the 2011 instructions and they are mute on the distinction of cash versus accrual and I was thinking that matching contributions to tax returns would be a smart thing, but perhaps that is not the best criteria in this case. Either way does not change the years that we are required to file.
Given the potential for penalties outside of the penalty relief program it does seem prudent to submit all possible required forms, even if they are duplicated, rather than wait to see what form 4506 returns.
Thanks again.