Delinquent 5500-EZ - paper or e-file?

[Spencer]

We are a CPA/TPA firm. We have just taken over a tax new client. They asked us to prepare the Form 5500-EZ for their solo 401k. It turns out they should have filed for 2013 and 2014 as the assets exceeded $250,000 in 2013.

Typically, we would prepare and e-file the Form 5500-SF and mark one participant plan. However, I believe the penalty relief for the EZ form requires a paper filing.

Should we paper file the 2015 Form 5500-EZ? or use the one-participant Form 5500-SF and e-file?

All thoughts and suggestions appreciated.

[Flyboyjohn]

If you're going to file under Rev. Proc. 2015-32 and pay the $1,000 reduced penalty for 2 delinquent EZs you have to file on paper