Usually, a distribution from a qualified retirement plan is treated as ordinary income in the year in which it is received. However, for someone born before 1936, there is a special 10-year averaging rule. It only applies, however, to a lump-sum distribution. This is a distribution payable within a single tax year of a plan participant’s entire balance from all of the employer’s qualified plans of one kind (for example, pension, profit-sharing, or stock bonus plans).
Advance payment of current tax liability based either on wage withholdings or installment payments of your estimated tax liability. To avoid penalties, you generally must pay to the IRS either 90% of your final tax liability, or either 100% or 110% of the prior year’s tax liability, depending on your adjusted gross income.