How can I avoid password problems in the future?

https://quickbookhelpdesk.com/blog/quickbooks-password-reset-guide/

Create a strong and memorable password, keep your recovery information updated, store your credentials securely, avoid sharing passwords, and review your account activity regularly. Forgetting your QuickBooks password can temporarily interrupt your work, but recovering access is usually a straightforward process. Whether you need to reset your account password or the password protecting your company file, identifying the correct recovery method is the key to restoring access quickly.