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

1. Modify the side profile of the object to include a thin rectangle and two squares. Currently, the object only appears as a long, thin rectangle.
2. Ensure that the side of the first square is about half the width of the rectangle. This is currently not the case as there are no squares present.
3. Add a second square that is slightly smaller than the first square. Currently, there are no squares visible in the object.
4. Adjust the depth of the extruded object to be about 20 times the width of the rectangle in the sketch. This is currently unclear due to the lack of reference or scale.