Use
You need a
Web Form Task to insert an activity in a workflow that can be executed in the Web Workplace.
The following parts of the task definition characterize a Web form task:
Procedure
Define Web Form Tasks

Alternatively, you can also create a new task from the Workflow Builder. Create a step of the activity type and go to the Control tab page. Here choose ![]()
→
Create task.
Extend the container definition
All of the data that is to be displayed to the form user or changed must exist as container elements in the task container.
system elements. To add elements to the container, choose You can only transfer and display single values (not object references) using a Web form. If you want to add container elements for this purpose, therefore, you must always create them with a data type reference to a table field in the ABAP Dictionary.

If you change a container element that is used on a web form, you have to generate the web transaction again.
Further Procedure
Complete the task definition: