Yes. If you received money from the sale of timber, you'll probably get a Form 1099-S. Some people will get a 1099-MISC, which is (technically) the wrong reporting form for timber per the IRS.
Money from a timber sale is reported as investment income. Follow these steps linked here. For your cost basis, most people will enter 0, but you can enter what you originally paid for seedlings or saplings.
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