The K-1 will come from the LP for any gains & losses of the LP until you sold it; you'll enter that on your return. Also, you may get a 1099-B from your brokerage for any trading gains or losses (I'm not sure of that as I don't regularly deal with publicly traded LP interests). Either form will require you to file a long-form 1040, thus you won't be able to use Federal Free Edition (Absolute Zero).
