How to report a capital gain from distribution exceeding my basis

I have a partnership where I received income in excess of my adjusted tax basis.  I am suppose to report the amount by which the distribution exceeded my basis as a capital gain.  In my case, it is a long term capital gain.  The gain is not reported to me on a 1099 or a k-1.  There are no proceeds and cost for this item.  How do I report this using TurboTax so the gain goes to the appropriate line on schedule D?