Please make sure you are signed in to Quickbooks Online as an Administrator before making these changes. The changes will not work if you are not logged in as an administrator prior to making the changes!
This is where you go to fix the error message:
BadRequest. Details: Dependent preferences are enabled : Show Items table on expense and purchase forms or Use purchase orders preferences are enabled , Inner Exception: Validation Exception was thrown.Details:Dependent preferences are enabled : Show Items table on expense and purchase forms or Use purchase orders preferences are enabled. Source: QuickBooks/Maintenance.aspx btnSave_Click
The highlighted spots are what will tell you that this is the problem.
Go to settings and then…
Make sure both of the underlined options are turned off. It can be finicky about switching- once we had to toggle it from off to on to off again saving between each change, so if it's giving you issues, try toggling the options back on and off again, then save.