就是如果你在IRA賬戶裏有稅前也有稅後contributions的話,不要以為光把稅後部分轉成Roth就可以不交稅。具體請看:
https://www.irahelp.com/slottreport/4-things-know-about-roth-ira-conversions-and-pro-rata-rule
結論:別把稅後錢放入IRA(就是說 when you are not eligible for tax-deductible traditional IRA contribution),然後想著可以全部免稅concert to Roth IRA