File Form N-400 in same state where you reside in US.

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Before filing Form N-400, the applicant must have a primary residence where they have lived at least three months before filing their application. The N-400 application must be filed in the same state where this primary residence is established.In addition, to become a US citizen, the applicant must be able to write, read, and speak English. The only exception to this is if the applicant has an impairment or disability which prevents them from learning the language. There are other exemptions, as well.

If you are more than 50 years old when you file Form N-400 and have lived in the US for at least 20 years as a permanent resident or are over 55 years of old and have lived in the US as a permanent resident for at least 15 years, you do not have to meet the language requirement.