CARES act NOL carryback/carryforward and the States

I have a 2020 $25k NOL which per the CARES act I can carry back to 2015 or carry forward.  My state of Idaho only allows a 2 year carryback period.  Does this mean I would file an amended 2018 for Idaho to use the NOL?  Or do I have to carry forward in order to apply to state taxes?  

 

Thanks