I am trying to amend a petty cash expense.system asks for a password. which password is required?

Hello there, @ravbizsa.

1. Go to the Gear icon.
2. Select Account and Settings.
3. Go to the Advanced tab,
4. Under the Accounting section.
5. Check if the Books is close.

For more information, consider checking out these articles:

• Edit your closed books.
• Close your books to lock past transactions.

Let me know if there's anything else you need about QuickBooks. I'm always here to offer more help. Have a good one!