unless the partnership partners with Turbotax and you are using a desktop version of the app, upload is not possible.
many publicly traded partnerships do and you can download from the website provided in the k-1 package you received the Turbotax file ending in .txf
if your version of Turbotax supports it, you can go to file> import >other financial software > browse files
for that .TXF file
online is manual input that cannot be reviewed until you pay the Turbotax fees and then print as a PDF to your computer all files and forms and supporting schedules. Not sur witj online if you can just download a apDF the k-1 supporting schedule.