Did you get the official divorce decree ? If not your technically still married if you haven't received the final decree in your hand.

I haven’t received the divorce decree yet because it’s not yet finalized. If I check mark Married, am I eligible for the waiver?

yes, add a statement and tell them you are requesting for a waiver because there’s a pending divorce

Thank you so much everyone. Just one more question, my green card will expire in Nov, my divorce will finalize at about the same time too. When should I submit the I751 that not too late and not to early?