How to create a sub-process to a task by opening it from the Creation form

Good afternoon. There is such a question. Being in the process, you need to create a subprocess, while this type of process is created from the creation form, and here you also need to open the form. If you create a subtask through actions, etc., the process is immediately created and we don’t see the form, so I create it through the action Redirect the user to the specified URL and then go to https://crm.hlr.ua/admin/customorder/sozdanie-novogo- klienta/add/, but we need to figure out how to make it a subprocess. There is a parent process id, is it possible to add a parent process id to the above process creation link? how to write in url? Or maybe there are other options? Thanks