If you forgot the email you used for TikTok but remember your username, try searching your email accounts for TikTok messages, or check your password manager if it’s saved there. Reach out to TikTok support with your username and situation description; they might request additional info to verify your identity. If your TikTok is linked to another service like Facebook or Google, try logging in through that. Attempt a password reset for every email you own; TikTok will send a reset link to the right one.