You cannot change your wallet address on the JumpTask dashboard. The current progress or balance of a specific wallet address cannot be transferred to another wallet address.
Whenever you press "Withdraw" the tokens will always be transferred to the wallet address you are using to connect to the dashboard.
So if you want to "change" the wallet address, you need to connect to the dashboard using your new wallet. But before you do that, it's important to keep the following information in your mind:
The information that is being stored about your earned amount of JMPT is tied to the wallet address.
If you previously used a different wallet and then suddenly changed wallets, you will need to have access to that first wallet you used for you to be able to see your previous earnings on the JumpTask dashboard or withdraw them.