US immigration is a complicated process and if you are applying for citizenship, you will need to get an application package to fill out from the Bureau of Citizenship and Immigration Services. You will need to fill out a fingerprint chart, a biographic information sheet and an official application. Each form will have detailed instructions on completing the application. The forms will ask your name, address, birth date, date of arrival in the US, and other information. The forms may also ask about your current job, so you may have to indicate what that is, whether you work for a web design company or work for a store that sells candles, or work in an office. Be sure to fill out the form as accurately and as completely as you can.
Once the Bureau of Citizenship and Immigration Services has reviewed your application, you will be scheduled for an interview. To prepare, you will need to learn English as well as US history and civics. At the interview, an examiner will ask you questions about your application and will want you to file a petition for naturalization. This petition is filed in naturalization court and a fee must be paid when filing the document. The examiner then will ask you about US history and government. You will then be asked to sign your name in English. As part of your interview, you will also be asked to pass a simple dictation test. You may not have to pass the literary test if you have lived in the US for 20 years or more and are over the age of 50. You may also be granted an exception if you have a physical disability or ailment that makes it impossible for you to read and write.
Once you have passed the interview and once your petition is filed, you will need to attend the court hearing. Your examiner will be there and will tell the judge that you qualify for citizenship. If your examiner has decided that you do not qualify, you can still appear in court with an attorney and plead your case directly to the judge, who may or may not decide to grant you citizenship. Once the court decides that you will become a citizen, you will need to take an oath to the US. The words of this oath are:
“I hereby declare, on oath, that I absolutely and entirely renounce and abjure all allegiance and fidelity to any foreign prince, potentate, state, or sovereignty of whom or which I have heretofore been a subject or citizen; that I will support and defend the Constitution and laws of the United States of America against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I will bear arms on behalf of the United States when required by law; that I will perform noncombatant service in the Armed Forces of the United States when required by the law; that I will perform work of national importance under civilian direction when required by the law; and that I take this obligation freely without any mental reservation or purpose of evasion; so help me God. In acknowledgement whereof I have hereunto affixed my signature.”
Once you have taken the oath, the judge will sign an order which grants you naturalization. You will then be given a certificate or naturalization, which shows that you are a U.S. citizen.
Article source: http://www.immigrationews.info/blog/the-process-of-applying-for-us-citizenship/