What Code W Detail to select for Portfolio Deduction in Box 13, form 1065?

I purchased a stock a couple years ago and completely sold them out last year. I got a schedule K for it.

 

In box 13, there's a code W with an amount of $38. The supplemental information says that this is portfolio deduction that was previously in 13K.

 

The $38 amount also showed up in box 20 as code B. 

 

What option should I select when prompted to enter code W detail? I cannot skip it since when doing the smart check, I was asked to "enter 38. on the appropriate line or lines in this section" since "Other Deductions Code W Line 1 has no entry."