Retirement tax questions

Thank you so much for the help and the detail you gave. Had an idea of what I needed but wanted to confirm with other members of the community. I really appreciate it.

 

This is more of just a broad question that some may or may not be able to answer.

I've read varying degrees from other topics and what not, but would one check for XXXX amount, five separate 5329 forms, and a generic cover letter explaining what I did, all placed into one single envelope work?

 

Could I simply send that in the mail or would I be better off with one cover letter, five checks and five 5329 forms all attached separately inside a single envelope.