Your spouse's supporting documents are almost the same no matter you file together or not.
The only difference,
1)
I-485
Part 3. Processing information.
B. Applying with you?
check [No]
2) your I-485 receipt copy
Please refer to
置顶: post again:485 申请过程中的简单问题/个人解答/装订 -TX_Kitty-