My client has a K-1 S-Corp. The shareholder basis worksheet has in the other decreases section "Sale of 33 Shares 3/2/2018". Should I also have a 1099-B? If not, do I need to report the sale of the 33 shares (I am assuming so). I also assume, I need to contact my client and ask how many shares he originally purchased, the date and the purchase price.