Hi Alfonso,

Since the task_id field is not natively available in the purchase.order model in Odoo, you will need to create a new field or use an existing related field to associate a task with each purchase order.

Here are a few potential solutions:

1. Create a new task_id field on the purchase.order model:
   • In Odoo Studio, go to the purchase.order model.
   • Create a new field of type Many2one or Reference that links to the project.task model.
   • Name the field task_id or something similar.
   • Save the changes, and you should now have a task_id field available on the purchase order form.
2. Use an existing related field:
   • If your purchase.order model already has a field that relates to a project or another model that has a task_id field, you can use that existing field to access the task_id indirectly.
   • For example, if you have a project_id field on purchase.order, you could potentially access the task_id through a related field like project_id.task_ids.

Without knowing the exact requirements and structure of your Odoo instance, it's difficult to provide a more specific solution. However, if you provide more details about your use case and the existing models and fields you have available, I can suggest a more tailored approach

Hope it helps