To accomplish this, let's utilise the “renameFormInstance” step in the process definition. 

Let’s use the Form definition “TestFormFile,” which appears as follows:

Let’s use the process definition “TestFormFileDef,” which is as follows:

Let's move the “renameFormInstance” step to the designer and link it to the final step of the process. The red alert sign indicates that the step property configuration is incomplete. The context is to fetch the Form field values and rename the Form instance.  

Click on the “renameFormInstance” step to set up the Settings properties.

Save the changes to the step and process definition.   

Let’s generate and execute a new process instance to view the change to the form instance name. 

Then, navigate to the Engage > Tasks page, as shown below. Select the Instances search filter and choose the process instance from the drop-down list. The incomplete task assigned to the user appears below. You can also search for the task using the Search textbox. Click on the task to open it.

When filling out the Form, enter “Admin-Simpson” in the entire name field. Then, submit the Form. 

The following shows the execution path for the process instance.

You can navigate to the Form instances to view the list. The list should include a Form instance named “Admin-Simpson” because that was the value entered in the “txtFullName” field.