My father passed away and I was his beneficiary on his pension. Part of the money is a tax-free distribution, with a larger amount being taxable distribution, which I would be required to pay taxes on. I need to take this as a lump sum, it says they will take 20%, but how much more will I have to pay on that money, besides that. I have 3 children, and both myself and my husband both work. I am worried about my tax liability.