Hi Jennjj,
I'm so happy to hear that you've heard something!! You're getting close! Stay positive
So for the time that your husband was not working or studying just put unemployed. If he was traveling, put that he was travelling. You want to be as transparent as possible.
This is the address you should send the docs back to for the Columbia office, which I found on my husband's Acknowledgement of Receipt is:
Immigration Section – Section d'immigration
Carrera 7 # 114-33 Piso 13, Bogotá, Colombia
Also quote your Case#/File # so your docs don't get lost.
Good luck, hope all goes well. Remember you are one step closer.
LMAX ;D