The Form Data Update Tool is used to update form data for forms that have already been submitted. This is typically used for processing existing forms and updating fields based on business rules or data from external systems. Note that trying to use this tool on a form that has not yet been submitted will result in an exception. For pre-filling form fields for new forms consider using either the Preset Form Data Tool or use hash variables in your forms. 
Figure 1: Form Update Tool configuration screen
The following options are available in the configuration screen:
- Form - Select the form that you wish to update.
- Update Fields - Select the form fields that you wish to update. The value can either be entered directly or you can use a hash variable.