While you cannot "crack" the password, you can use these methods to restore your data or access:
If you have lost a user password but still have Administrator access, you can reset it by going to Alt+K (Company) > Users and Passwords . This does not work for the Tally Vault password itself. How to Prevent Data Loss in the Future
: The underlying data files in your computer's folders are converted into a non-human-readable format.
The if it is lost because it uses high-level encryption that does not store the decrypted password anywhere in the system. Forgetting this password results in the permanent loss of access to your company data unless you have an existing backup. Understanding Tally Vault Security