To claim a capital gain on the sale of timber, you would enter this as an Investment Sale under Personal >> Personal Income >> Investment Income >> Stocks, Crypto, etc. Skip the import, choose Other investment type, and enter your details. You'll need to know your adjusted basis in the timber to offset the sales proceeds.
TurboTax creates a Form 1099-B worksheet (not an IRS form) that will show how the gain was calculated.
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