Dear Theresa Hikita,
Thank you for posting your request on History Hub!
In most cases, the National Archives will not have a copy of the certificate of citizenship. Two copies of the certificate were created – one given to the petitioner as proof of citizenship, and one forwarded to the Immigration and Naturalization Service (INS).
Certificates of citizenship were issued by the Federal courts until October 1991 when INS took over responsibility for naturalization proceedings. Certificates may be requested through the USCIS Genealogy Program.
We hope this is helpful. Best of luck with your research!