What are the other documents we need to prepare for a family based green card?

A marriage-based immigration application requires Forms I-130 and I-485, each with a full set of supporting documents; Forms I-131 and I-765, as well as biographical information forms and an Affidavit of Support will be needed, along with supporting documents. Also among the needed documents are birth records, marriage certificate, evidence of the termination of your wife's first marriage (through divorce or death), and evidence that you and she are living together in a bona fide marriage. Other documents may be required too, depending upon your and your wife's circumstances. There is no law that requires a couple to be represented by an attorney in the immigration application process. Nonetheless, the application process can be far more complex than it might appear just from reading the forms and their instructions and researching information on the Internet. Failure to properly prepare and fully document an application can lead to significant delays or even more harsh consequences. It would be wise for you and your wife to consult with an immigration attorney who, after learning all of the relevant information about you, your immigration-related history, your marriage, etc. would be able to advise about eligibilities, options and strategies, and would be able to offer legal representation for the application process.