QB Issue Resolution:
You can not do it
If the self employed company is closing, then that is what you do, close and file a final schedule C
If the new company is not a sole proprietor, then you create a new set of books for the new company, which includes getting a FEIN from the IRS, state sales tax and business licenses, etc etc.
QBSE data can not be transferred to QBDT or QBO, and you can not upgrade from QBSE to QBO either
Resolution for Issue 'I opening my own company, so I would like to change my self-employed account to a business account. how can I do it ?' available: Yes (Solved).
Source: Intuit Community forum.
I opening my own company, so I would like to change my self-employed account to a business account. how can I do it ?: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.Support for business account
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Error Recovery for business account [Canada]
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