I am just trying to learn about the NVC process as much as possible, so I was going through all the topics and did see how most of the people who did use joint-sponsors, they are somehow related to the petitioner.

With our case, my husband's this year's income is well above the poverty line but we will need a joint sponsor because of lack of taxation of previous years, and a good friend/colleague(he is a USC) of my husband has lend his help in this regard. I was wondering if that would be ok or not, or does my husband really needs some relative to be the joint sponsor or anyone can be a joint sponsor as long as he/she is a USC and have filled past 3 years of tax returns.

Thanks for the clarification

Anyone can be the Joint Sponsor, as long as they fulfill the requirements, including having filed their tax returns and meeting the income requirement. The Joint Sponsor should use the I-864 form and file as "I am the only joint sponsor" - assuming that they are. Your husband still needs to file a complete I-864 as well.

Thanks for the prompt reply, Saradaniella.

So at least we won't have any problem with the joint sponsor

And yes, I do realise my husband is going to be the main sponsor and he will need to fill out i-1864. I am just trying to learn as much as I can about the NVC stage, it seems pretty complicated to me as of yet.

Thanks again

if your husband's this year income is well above 125 % line then you don't need joint sponsor
he only needs to send in most recent tax return THAT IS IT