Section 1256 loss carryback

I am using TurboTax home and business and entered the details from the K-1 (Form 1065) I have from a partnership. K-1 has losses in  Box 11-C (contracts and straddles). Looks like TT is filling the forms correctly and its taking me to completion, final review and is ready  to file the taxes. I want to carry the losses to previous years but it is not giving me an option to do it. Could you please advice how to do this in TT.

 

Thanks in advance.