You can either pretend that you already received the K-1 and enter it in the K-1 section of the program (use Line 4a) or you can enter it as if you had sold a stock or mutual fund in the Investment Income section and record a long-term gain of $2,594. Either way should give you a good estimate.
[also, note that if your taxable income, assuming your filing status is single, is less than $41,675, then your long-term capital gains tax rate would be 0%]
