Based on the answers provided, the following corrections are needed for the 3D object:

1. Include a square inside the extruded parallelogram. This is currently unclear and needs to be made visible.
2. The square inside the extruded parallelogram should be negatively extruded to create a hole. This is currently unclear and needs to be made visible.
3. Ensure that the hole created is square-shaped and goes through the entire extruded parallelogram. This is currently unclear and needs to be made visible.