Thanks for your comments. I’ll plan to send in the five single-sided sheets. That’s not much more than the three sheets required for the two sided form.
It’s interesting that the form they provide is printed on both sides. Each of the five sides includes name and Social Security number so it looks like they are prepared for either case.
At present I prefer doing my own taxes and mailing in a paper return. I’ll take another look at the electronic options and consider that in the future.