Turbo Tax automatically fills out the 2019 Form 1139 for a NOL carryback, however, it does not look like the loss is carried back over the correct 2 preceding years according to the Tax History. The 5th preceding year is correct, but the 4th preceding year is still using the 5th preceding year Taxable income instead of the true 4th preceding year income. Also, Turbo Tax fills in the 3rd preceding year with the 4th preceding year Taxable income. Is this correct or does the form have a bug?