My parents only have $13200 per year social security income. That is all their income. They are both over 65.They want to sell as much mutual fund(Ira) as possible before they hit the limit that they have to pay any tax this year. I believe the total is $32000 with all standard deduction. How much worth of Mutual funds can they sell before they have to pay any tax? I want to say 32000-13200, but someone told me that not 100% of social security income is taxable.