See link for password removal tool.
Resolution for 'administrator password issue: 'I don’t know my administrator password' available: Yes.
The administrator password 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 administrator password issue yourself by looking for a resolution described in the article. If it is a complex administrator password issue or you are unable to solve the issue, you may contact us by clicking here or by using other administrator password support options.
For more information about resolving issues related to administrator password in Quickbooks/QBO or to get support for the issue 'I don’t know my administrator password', click the link below: