Deductions & credits

I am sorry, I am not understanding when you say they are on the same line? Here are some screenshots on how it would look like,  

Both are on separate lines- If you traded in the property to buy a new one, the proceeds of disposition is the amount you received for the trade-in. For example, if you trade in your old car and receive a $4,000 credit toward the new one, the proceeds of disposition is $4,000.