Yes, you can have multiple businesses within QuickBoooks. You can only have open 1 company at a time.
All you have to do is create a new file.
File menu > new company
Resolution for 'ccount for 2 issue: 'Can I use my quickbooks account for 2 small businesses' available: Yes.
The ccount for 2 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 ccount for 2 issue yourself by looking for a resolution described in the article. If it is a complex ccount for 2 issue or you are unable to solve the issue, you may contact us by clicking here or by using other ccount for 2 support options.
For more information about resolving issues related to ccount for 2 in Quickbooks/QBO or to get support for the issue 'Can I use my quickbooks account for 2 small businesses', click the link below: