Cannot conver UnityEngine.Transform to UnityEngine.GameObject

I have this annoying error with my script, how do I fix it?
My script:
var TactScript : ThrowTact;

public var Health : float = 100.0f;

var Player : GameObject;

var DefSpawn : Vector3;

var Tact : GameObject;


   
function Update () {

     
         Tact = GameObject.FindGameObjectWithTag("Tact").transform;

  if(Health == 0 && TactScript.HasTact == true){
  Player.transform.position = Tact.transform.position.up * 3;
  Health = 100;
  }

  else
  
  if(Health == 0 && TactScript.HasTact == false){
  Player.transform.position = DefSpawn.transform.position;
  Health = 100;
  }

}

The problem is this line:

Tact = GameObject.FindGameObjectWithTag("Tact").transform;

Tact is a GameObject, and you’re assigning the Transform of the GameObject tagged "Tact". A Transform cannot be converted into a GameObject, even if typecasted.

What you should do is delete the .transform at the end of that line. That should fix the error.

Change this line:

Tact = GameObject.FindGameObjectWithTag("Tact").transform;

To:

Tact = GameObject.FindGameObjectWithTag("Tact");

Transform - is the component of Game object(it added by default).
Your error - DefSpawn is Vector3, it does not contain transform, this is simple 3d vector.
Player.transform.position = DefSpawn;