不可撤销资产:看第二段最后一句话“for the irrevocable trust, the cost basis of investments does not change, and the assets are not subject to estate taxes” 即不可撤销信托的税基不变,并且没有遗产税,所以仅仅需要在T时刻(将来)卖掉资产中股票变现的时候,交capital gain tax,所以不可撤销信托将来被征得税是:[2million*(1+r)^t-200,000]*20%