NOL Carryback

I have a 2019 NOL that I'd like to carryback, per the CARES Act.   I didn't file the 1045 within the correct time frame, so I believe I should file a 1040X in order to request the carryback.  Can someone provide more details on how that is done?  Specifically, would I then complete a 1040X for 2019 and each of the five years preceding (2014-2018)?  In this case, is the 3-year time allotment to file an amended return waived?