You can only import a K-1 to the Windows Desktop CD/Download Software, not to Online version and if you can get a .txf file for it and in the right format. Apparently you can only import K-1s for MLPs and not Trusts or Estates. You can not import a K-1 from Turbo Tax Business Program.
How to import a .txf file into the Windows Desktop program
https://ttlc.intuit.com/turbotax-support/en-us/help-article/import-export-data-files/import-txf-file...
