StoneKay

On the form i-130, it has an expiring date on it saying 07/31/2018....  What dose it mean?   Can i still fill it out ?

I am from Nigeria and my wife is a US Citizen. We both live and work in Qatar for over four years now. But we got married [wedding] on "march,2018" here in Qatar. i have applied for a visitors visa so i can met my new families but was denied TWICE, On my last interview the officer suggested i apply for a spouse visa instead. I only want to be visiting i do not plan on staying in the US for now.. 

my Questions

1. Dose getting a spouse visa allows me to still live abroad or do i have to live in the US for a period of time ?

2. what documents do i need to get ready before starting the spouse visa application process? from me and my wife ?

Thanks for your help in advance.......