To import your K-1 into the TurboTax desktop software (you cannot import K-1 into online versions of TurboTax), imports are limited to a .txf file for Master Limited Partnerships (not Trusts or Estates).
See the TurboTax FAQ link below that explains how to import K-1 into TurboTax using the .txf file:
https://ttlc.intuit.com/replies/3300056
