Hello
I am a US citizen and sponsored my mom who is now the US permanent resident. Soon after she got approved, she applied for all 3 of my siblings. Now my mom is the petitioner for their cases. Recently my youngest brother's case became current and now we have to submit his affidavit of support and visa forms.
My mom doesn't work and she doesn’t own A house. But our house is listed in her permanent and mailing address. She also has US bank account and filed tax return in 2014. But in 2013, we showed her as our dependent in our tax return because that’s the year she arrived in to the states as an immigrant.
Now, I earn above poverty line and I think it’s enough for a household member of 8 (or above). I want to be the joint sponsor along with her and would like to know which forms do I need to fill out for the Affidavit of support. Any kind of help is highly appreciated.

