Personally, I brought my USC husband's passport and birth certificate. I also brought the interview letter, my greencard, driver license, all of my passports (two expired and one valid), a few more docs proving a bonafide marriage (3 year rule) and the entire tax return that we had filed just a couple of days prior (no transcript available yet).
Before the interview started, the IO wanted to see my ID/DL, my greencard and two of my three passports (the valid/newest and the oldest with the K-1 visa in it).
After the interview she scanned my tax return into their system.
So in my case nothing was needed from my husband, and no extra evidence either (I had already uploaded a ton in my online account and been through ROC a year prior, so that probably helped).
If you owe taxes from previous years, make sure to bring your payment plan. We didn't owe but I have seen others having issues for forgetting to bring it.