I am not sure what you are asking, QBSE is one company one account and for one person/owner

You can of course share the log in with anyone

Resolution for 'course share issue: 'how to create a joint account' available: Yes.

The course share 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 course share issue yourself by looking for a resolution described in the article. If it is a complex course share issue or you are unable to solve the issue, you may contact us by clicking here or by using other course share support options.

For more information about resolving issues related to course share in Quickbooks/QBO or to get support for the issue 'how to create a joint account', click the link below: