First don't panic ... this is a common error where you fail to enter the sale from the 1099-B that was also reported on the W-2. Using the amendment process add the missing sale so the program can recompute and populate the 8949 & Sch D which is what you need to respond to the IRS notice. Call the number on the notice if you don't understand how to respond or what the IRS will need to be sent to resolve this issue.
