How to apply for green card?

your spouse will need to file an I-130 immigrant petition through USCIS, plus an I-485 adjustment of status form and an I-765 work authorization form. they should all be filed together although the filing fees are about $1,400. go to www.uscis.gov for more information and downloadable forms. be sure to read through the instruction sheet for the I-485 in the forms section.