If you are unable to access your USCIS online account for your N-400, it is usually a technical or account-linking issue rather than a problem with your naturalization case itself. USCIS adjudicates the application independently of online account access, so your case will continue processing even if you cannot log in. You should try calling the USCIS Contact Center to request account re-linking. If you have any other questions, feel free to ask them in our next Lawfully office hours session! - Attorney MaryJoy Chuba (All information shared here is for general educational purposes only. It does not constitute legal advice or create an attorney - client relationship. Your situation may require fact-specific guidance. For personalized legal advice, please consult an immigration attorney directly.)