I think you're referring to capital gains tax. It's at 15% now, but subject to change next year.
My sister and I sold our family farm last month. Our accountant was pleased that we had not only sold it this year, but we got the full price in cash. She was worried about what capital gains will do next year.
Kinda hated to sell it since it had been in the family for 109 years, but time marches on. Our daughter is settled in the Washington DC area, and my sister's four kids are scattered between here and California, so there was no next generation waiting in the wings to take over. Then, my sister and I both owned an undivided half interest, and our attorney had been bugging us to divide it for our own estate planning. But, the farm was configured so it would be impossible to divide it between two people and be fair about it.
So, we decided land prices are high, it's a seller's market, we could control the shots, split the money and invest elsewhere. Plus we prevented the possibility of taking a beating in a forced sale someday to pay medical bills or something else unforeseen at this time.
Actually, we sold it to a longtime friend and neighbor who already owns land on two sides. My wife and I retained a ten acre plot on one end that includes our house and my shop. And I put a clause in the sales contract that I retain deer hunting rights for myself and up to six guests for ten years.