How do I carry forward part of my 2017 Harvey casualty loss to 2018 using Turbotax?

When I reduce my casualty loss by $150,000 in my 2017 return, my refund does not change at all.  Can I carry forward the $150,000 to my 2018 return?  Please explain how I will do that in my 2017 and 2018 returns using Turbotax.  Thank you.