Call customer service. They should be able to help you.
Sounds like someone else registered the original […]
Resolution for 'Cannot register issue: 'Cannot register QB.' available: Yes.
The Cannot register 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 Cannot register issue yourself by looking for a resolution described in the article. If it is a complex Cannot register issue or you are unable to solve the issue, you may contact us by clicking here or by using other Cannot register support options.
For more information about resolving issues related to Cannot register in Quickbooks/QBO or to get support for the issue 'Cannot register QB.', click the link below: