Mailing 1065 Forms, which forms are required?

Hi, I e-filed for my llc where I have a profit but I am mailing form 1065 for 2 other llcs that have 0 activity, no profit, no cost, etc. I keep them in case I ever need them. 

 

Which forms are required:

 

When I did have profit to show I included the following:

 

-- 1065 pg 1-5

-- 1125-A cost of goods sold

-- Schedule B-1 partners owing 50% or more

-- Schedule K-1 (one for me and one for him)

 

Are all of these required to mail them as well?

Also can I mail everything in one envelope or should I use 3 separate envelopes and pay certified mail three times?