What is Form N-400?

N-400, Application for Naturalization, if the application to apply for U.S. Citizenship through naturalization. What this means is that this form is used by U.S. permanent residents that meet the necessary criteria to apply for citizenship. 

When to file Form N-400:

As a general rule, permanent residents over the age of 18 are eligible to apply for naturalization after they have been held and maintained permanent resident status for 5 years. Some exceptions exist, such as spouses of U.S. citizens who obtained their permanent residency through that spouse. In that case, they can apply after 3 years as a permanent resident. There are also some exceptions for members of the U.S. military. 

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Generally, this form is filed separately from other forms and doesn’t require any other forms to be filed simultaneously.

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