[QUICK PLEASE] E-filing a Second Extension with the IRS

I have never been more tired in my life. Seriously. I have made 6 round trips from Beltway/Briar Forest to The Woodlands in the last three days. Not to mention a few out to Katy and to IAH as well. Add that to the normal stress of a wedding and the badass party/afterparty that was our reception and I am one pooped muther. As such, I am way too tired to bother looking for where and how I need to do this online. Since I will be asleep before this thread is even posted, can some master googler or accountant let me know? It has to be filed one way or another by tomorrow, but since we e-filed the first one, we've been told that we should do it the same way. I just can't find how we did it the first time. The brain is mush (well, mushier than normal).

Thanks and good night.