Reporting Timber Harvest Depletion

How do I report forest timber depletion?

 

I believe depletion should be reported on IRS Form T, but TurboTax doesn't include a Form T in its software.

 

For example, my forester estimated the cost basis of our forest to be $x and the depletion of one year's harvest of $y. How do I report the depletion amount using TurboTax?