QB Issue Resolution:

if you turned it on in company settings, bring up the chart of accounts, a new column on the right is available that shows the account numbers. QBO only numbers some existing accounts for you, the others you have to edit the account and enter a number

Resolution for Issue 'In Quickbooks Online Accountant, I am trying to add numbers to the Chart of Accounts and I can’t find any options to do that task.' available: Yes (Solved).
Source: Intuit Community forum.

In Quickbooks Online Accountant, I am trying to add numbers to the Chart of Accounts and I can’t find any options to do that task.: 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 Chart of Accounts
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Error Recovery for Chart of Accounts [Canada]
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