QB Issue Resolution:

Left hand banner Accounting>Chart of Accounts

Far right is a drop down menu for each line, View Register is what you should see as the primary. Click on the arrow to expand, select EDIT and do just that, edit your accounts

Resolution for Issue 'How do you edit the expense category names?' available: Yes (Solved).
Source: Intuit Community forum.

How do you edit the expense category names?: 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.

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