T2209 计算 foreign non business income tax credit. 如果国外交的税大于计算出来的FTC, 没有用的部分 can't carry forward, be can be deduct on line 232. My question is , if that one is deduct on line 232, the the line 260 taxable income will change, then the form T2209 calculation of the FTC will also change, the the unused FTC will change......Seem the calculation step in a loop. 真不明白税表是怎么设计的。 有懂的吗，指点一下。谢谢！