Resetting the Quickbooks file password can be frustrating but if actually very simple if done correctly step by step..
The process requires two major steps, Verification & running the tool.
below are the step by step process.
Click on this link & verify that you are the genuine license holder of the product.
Once done it will ask you to run download the password removal tool so do that.
meanwhile Intuit will send you a code on your email id.
2: Once you have received the code, run the password removal tool which will ask you for the code sent to your email.
You need to select the file from which you want to remove the password in the password removal tool. It will then ask you to enter a new password.
The entire process takes around 15 min.
Hope this helps.