Based on the feedback, the following corrections need to be made to the 3D object:

1. Modify the object to resemble a T-shape. Currently, it is a long rectangle with a smaller, offset rectangular cutout or notch on one side. This needs to be changed to a T-shape configuration.
2. Ensure that the vertical part of the T-shape is a long rectangle. Currently, the object itself is a long rectangle, but it does not align with the structure of a T-shape.
3. Create a smaller rectangle to serve as the horizontal part of the T-shape. Currently, there is no horizontal part of a T-shape present.
4. Connect the horizontal rectangle closer to the top of the vertical rectangle to form a T-shape. Currently, there is no horizontal rectangle connected to a vertical rectangle in a T-shaped manner.
5. Adjust the length of the horizontal rectangle to be around 1/4 of the length of the vertical rectangle. Currently, the object lacks separate horizontal and vertical rectangular components.