You don’t need a joint back account to win a marriage-based green card. The only thing that you absolutely need to prove your marriage is a marriage certificate. After that, you need to provide documents that paint a picture of your life using lots and lots of paper.
We have a great list of 99 documents to submit with your Marriage-based green card application that you should submit with your application at this link.
If you need to talk to an experienced immigration attorney. We’ve helped hundreds of people traverse the complicated immigration and citizenship process. We would love to help you as well. Call (617-272-7980) or email firstname.lastname@example.org to get in touch.