Hi @oldgreygrammy,

Thank you for following the steps provided by my colleague.
 

The reason why the Show Inactive Accounts option is grayed out because you don't have any inactive accounts in your Chart of Accounts.

Let me show you through the screenshots below.

For more information about the chart of accounts, refer to this link: Chart of Accounts.

Please let me know if you have other concerns. I'm just a post away. Have an awesome day.