FI entry - Correct Line Item from Simulate Screen and Long texts editor

Dear Experts,

In FB60, if I click on line item, I will see long texts editor.

If I select simulate, then select line item, I cannot see any long text editor.

I have to input long text for Tax line item (which is available only from Simulate screen).

Do you know how to get long text editor on screen Line item Correct from Simulate mode?

Thanks.