In many cases, you may reapply. If you reapply, you will need to complete and resubmit a new N-400 and pay the fee again. You will also need to have your fingerprints and photographs taken again.

Yes, you can as long as your Permanent Resident Card is not expired, and you do not have any serious crimes on your record.

You may visit www.uscis.gov or call the National Customer Service Center at 1-800-375-5283. Have your A-number ready and application number. You may also write or visit the USCIS office.

If you have a pending application or petition at a service center, call the NCSC toll-free number at 1-800-375-5283 when you move to report your address change.

Your time as a continuous resident may be broken. You will have to prove that you continued to live, work, and/or have ties to the U.S. (e.g. paid taxes) while you were away.

After USCIS has received your application, they will notify you of the location where you should get fingerprinted.