I ted my I-140 (NIW) and I-485 last September. My I-140 got approved two months ago and I got I-485 RFE this week.
The following is the detail in the I-485 RFE letter. It looks they request a job offer. But I did send a copy of employment letter to them last year. Any suggestions will be welcome.
"You must a currently dated letter from your intended permanent employer, describing your present job duties and position in the organization, your proffered position (if different from your current one), the date you began employment and the offered salary or wage. This letter should be in the original and signed by an executive or officer of the organization who is authorized to make or confirm an offer of permanent employment. The letter must also indicate whether the terms and conditions of your employment-based visa petition (or labor certification) continue to exist."