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Not sure if I did it wrong or not but going through the Investment section for the 1099-S,  did not give any option to select an "N" code. It asks for proceeds, am I supposed to list it as $0? The 1099 reflects that I got 50% of the sale, but I did not. I feel like this would be an instant audit since the IRS did receive the information from the broker. The only way I can get the form to reflect accurately sticks me with a $79k gain through the "sale of main home" form.