Go to Autodesk Tinkercad's official website and get Autodesk Tinkercadclear.exe. Open with the option administrator Run.
You need to begin your computer in safe mode. Then run the utility and identify the place of the Autodesk Tinkercad program file in the next window or leave the default is correct. Then click Uninstall.
Wait for the process to complete. It may take some time. In the end, you need to restart your computer.