Take Your Fingerprints
You also have to have your fingerprints taken. The FBI will use them to run a background check and USCIS will update its records with them.
1. USCIS will send you an appointment letter telling you when and where to go for your fingerprinting. If you absolutely cannot attend at the place or time, follow the instructions for rescheduling on the letter.
2. Arrive early for the appointment. Do NOT be late or skip it altogether.
3. Bring your appointment letter from the USCIS to the fingerprinting, along with your Permanent Resident Card and another form of official photo identification, such as a driver's license or state ID.