TurboTax does not support the calculation of an NOL nor does any edition of the program include Form 1045.
See https://digitalasset.intuit.com/DOCUMENT/A6QrdFCgW/010421-2020-unsupported-calcs-L1FQfTTgn.pdf
As a result, you would have to prepare Form 1045 manually, combine it with your TurboTax return, and then print and mail them together.
