Depends on how busy the Application Service Center in your area is. From what I have seen around, people usually get their biometrics appointment letter within a couple of days after their I-485 application is accepted. Though, in my case, it took a whole month for me to get an appointment letter, and the appointment itself was 2 months after the day my I-485 was accepted. Luckily for me though, I received my interview appointment letter on the same week I received my biometrics appointment letter. So even though I waited a whole month for my biometrics appointment letter, I did not have to wait for my interview appointment letter.
If it has been more than 30 days since your application was accepted and you still have not received your biometrics appointment letter, you can call the USCIS customer service number and inquire about your case. Good luck!
Hi all, my case number became current in march and I sent my I485 around March 12 to Chicago. After my file accepted, I got a bio letter invitation first week of April and bio interview will be held on May 7. So when can they give me an interview date?