You can enter the NOL into TurboTax without creating a "business schedule" (Schedule C is what I presume you are referring to); there is an entry on Schedule 1 of your 1040 indicating the figure on Line 8 is an NOL.
An explanation statement is also created provided you complete the one offered in TurboTax. It simply provides detail on how you calculated your NOL. I believe, but am not certain, that the statement is transmitted along with the rest of your return. Consequently, it might be safer to print and mail your return with the statement attached.
