There is too much money on my return, there is something called withholding tax, but I did not choose this. Can you help me to fix this ?

If you see withholdings this is because you entered a W-2 with taxes withheld on your return.

Also, if you are not a US resident, then you would need to file a 1040NR which TurboTax does not support.  You can use Sprintax.com to file the 1040NR.