With QuickBooks Online there is an additional subscription charge for each additional company you create. You can create a second company by clicking the following link:
http://quickbooksonline.intuit.com/finance-accounting-solutions

Once you select your version be sure to choose, “Already have an Intuit User ID” and sign in with your current information.

Resolution for 'Add Company to QBO issue: 'How to Add a New Company to QBO?' available: Yes.

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

For more information about resolving issues related to Add Company to QBO in Quickbooks/QBO or to get support for the issue 'How to Add a New Company to QBO?', click the link below: