You are filing based on the 3 year rule, meaning you have to show 3 years worth of proof that you lived in marital union with your spouse, eg utilities, bank statements, insurances, basically it's almost like the documentation for removal of condition, but it needs to be up to date, Pictures, etc select random bills, if you started living with your husband say in june 2020, put like 3 receipts of that year, like few more receipts for random years that is, 2020,2021,2022,2023, you don't need a tone of these, just few. They will need proof of comingling and living together in marital union, lease / rent, life insurance showing each others as beneficiary, health insurance too, kids' birth certificates of pet ownership docs, if you removed conditions and submitted these, make sure you submit them again and add the recent ones you got after submission of I751. You have a lot of resources on this forum to look from.