How can I avoid printing the Total Work and Actual Work fields from a custom task form?
Outlook prints certain fields on each form by default. When you're using a custom form, you can turn this default printing on or off for each field through the properties of the control that displays the field.
Because the Actual Work and Total Work fields appear on a task form's Details tab, you need to add those two fields to a custom page. Just drag them from the Field Chooser. Right-click each text-box control, choose Properties, then go to the Validation tab and clear the Include this field for Printing and Save As text box. Finally, choose Form, Display This Page to hide this custom page because it duplicates fields already present on the Details page.