Below is a link that displays where to go & how to activate the preference.
Resolution for 'add inventory issue: 'How to add Inventory Part Type?' available: Yes.
The add inventory issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the add inventory issue yourself by looking for a resolution described in the article. If it is a complex add inventory issue or you are unable to solve the issue, you may contact us by clicking here or by using other add inventory support options.
For more information about resolving issues related to add inventory in Quickbooks/QBO or to get support for the issue 'How to add Inventory Part Type?', click the link below: