After you file
@SoePaing wrote:I am puzzled as to which one to use. Do I use Schedule A, which is already done by TurboTax? Or do I use the Worksheet 1 in Publication 536, which seems to be the IRS's way of calculating NOL?
Schedule A on Form 1045 is not included in TurboTax. You are most likely seeing Schedule A (1040), which is the form for itemized deductions.
Regardless, Schedule A (Form 1045) is exactly the same as Worksheet 1 in Publication 536.
