Documents for I-751

[AmericanDreamer23 2]

So I received my conditional green card last year Jan 2016 and around Sept of this year I will need to file my I-751. I am worried for two reasons, me and my husband ended up filing separately this year. He owes money to the tax department and for student loans and I did not want to pay his debt. Also the tax person did ours together and we ended up owing money to the government, where as if we filed separately we didn't owe nearly as much. Also we have our own bank accounts, we do have one together but we don't use it much. We used it a lot more before I got my green card, but since then my hubby has opened a new account. We both only have partial money going in there, not much at all. I know that we are meant to send proof of joint assets from when I got my conditional green card until we file for I-751 and I can send bank statements but there hasn't been much activity.  I have been reading that other people have sent statements for the full two years! We do also have a credit card together which we use a bit, but not all the time. We have utility bills, lease, health insurance, telephone bills, life insurance too. Can anyone offer advice on what to do? Will they question our bonafide marriage based on what I have just said? Any advice? I still have a bit of time to get things together but would rather do it sooner than later!!!