If you file a tax return, you would have a form 1040, everyone who is a US Citizen or Resident files a 1040. If you are a nonresident, then you would file a 1040NR.
The Tax and Interest Worksheet is found in TurboTax Desktop by switching to forms mode.
If you are using the Online version, you would find this in the Print Center by selecting Print all forms and worksheets.
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