QB Issue Resolution:

On the menu bar, go to “Company” and then go to my company, once there you can edit to correct spelling by using the icon marked like a pencil (in the upper right corner next to legal name) and you can make your corrections.

Resolution for Issue 'how do I change my company name' available: Yes (Solved).
Source: Intuit Community forum.

how do I change my company name: 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 Company
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Error Recovery for Company [Canada]
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