Get your taxes done using TurboTax

In Box 13 Code W is for Other deductions.  There should be a statement either on or with the K-1 stating what the deductions are.  It could be state taxes withheld, early withdrawal penalty, or several other things.  If you don't have an explanation statement for Box 13, Code W, contact the issuer of the K-1 for more details.  

In TurboTax, after entering the numbers for Box 13, you will be asked to enter details on the next screen.  [See screenshot below.]