If you have, you will be required to take that proof to your naturalization interview. Examples of required documents are a copy of your marriage certificate, and your divorce or annulment decree. If you changed your name through the court, you must bring a copy of the court decree that legally changed your name.
Although USCIS does not provide complete access to information about your pending case, it is possible to check for important changes in your review. You can do that using the following link: https://egov.uscis.gov/casestatus
If you have submitted an immigration filing and have not yet received a decision, then any time you move, you will need to change your address with immigration using the link below. If you move after your case is completed, you have no obligation to report changes of address. https://egov.uscis.gov/coa/displayCOAForm.do
The United States Citizenship and Immigration Services (USCIS) posts historic processing times (i.e. wait times) online all the way back to 2017 here. This link allows an immigrant to track the processing times for almost all immigration petitions. It is also possible to check processing times based on the specific USCIS field offices or processing centers at Processing Times. Even more...
If you do not have a copy of your I94 from your entry into the U.S., it is possible to obtain information about your entry using this link: https://i94.cbp.dhs.gov/I94/#/home There are some instances when you may need to request a replacement of this document from immigration to be able to move forward with your case. This must be requested using the application listed on the USCIS website.
Your Alien or “A” number is the number that immigration assigns to you for all immigration-related matters. This number is listed on every correspondence from USCIS as well as any approval and is usually nine digits long.