You would need a Application for Naturalization -Form N-400
Form N-400 is the one that is to be used in order to apply for naturalization.
N-400
N400 Naturalization form
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N-400 Application for Naturalization
Form N-400 is the form that needs to be filed in to become a naturalized citizen of the US. Applicant should have been a permanent resident and satisfy all the mentioned eligibility criteria. This form can be either got from a USCIS office, downloaded from the website or ordered through mail/phone.
After 5 years living in the US you can apply for Naturalization ( to become an American citizen) (form N-400 $675). You have to past the Naturalization test when you go for your interview. That's all there is.
It is a process by which you get the status of a US citizen. For this you need to first become a Legal permanent resident and satisfy a list of eligibility criteria. Form N-400 is the USCIS form that has to be used for the naturalization process.
A person have two options through which he/she can become a US citizen. 1. Person born to US citizen parents, enough if one parent is a citizen, is a US citizen by birth. As a proof for his/her citizenship they need to apply for the citizenship certificate using the US immigration Form N-600 before they are 18 years old or married. 2.Through the naturalization process a person can become a US citizen by applying for US citizenship using the immigration Form N-400 after the age of 18 years.
Through the naturalization process citizenship can be gained in US.Immigration Form N-400 should be used and basic eligibility requirements to apply are that you need to be green card holder at least 18 years old and have physical residence in US for a minimum 5 years uninterrupted.
You need to get form I-400. It is called a naturalization petition. Go to www.cis.gov for more info
The form that is used to for this is Form N-400 N-400 is used to apply for naturalization.A person who wants to get naturalized as a US citizen should make use of this form. N-600 is used to obtain certificate of citizenship through US citizen parent/s.