NOL carryback is 5 years. You either use 1040X or 1045. You need to recreate the years of carryback and enter the NOL into them to see what the impact is. 

https://proconnect.intuit.com/community/individual/help/how-do-i-generate-form-1045-application-for-... may get you started. 

https://proconnect.intuit.com/community/individual/help/entering-an-nol-carryback-from-a-1045-in-pri... is what I think is the answer to your original question