I did a ton of these in public practice at my old firm. Most recently, we’ve pushed these to the TPA because of the run around that accompanies the filings now.
If it’s a complicated NOL, I would suggest not filing the 1045 but rather filing the full amended return. This is because the are constantly coming back asking for every single related form (such as AMT or NIIT) even though these forms had zero changes.
Extremely frustrating, but the TPA is awesome to work with and very helpful.