Our RFE was for a missing blank page of I-864EZ.😔 However, my husband uploaded that and the latest tax statements. A lot of times NVC tends to ask for more stuff. So we thought it's better to give them extra, than to be asked for it later and wait for 3 more months. We re-submitted on March 16th. Hoping to be DQ'd this time.
The best part is, adding documents under Additional documents tab does not reset the clock & push you back in the queue. So no harm in adding whatever you want to add now. I just make sure I leave clear & kind comment so the officers understand my motive behind adding that additional document.