Q: I am a federal firefighter under the Civil Service Retirement System who will be eligible to retire next year with 28 years of service at age 50. When can I start withdrawing funds from my Thrift Savings Plan without getting penalized? A: If you receive a TSP distribution before you reach age 59 1/2, in addition to the regular income tax, you may have to pay an early withdrawal penalty tax equal to 10 percent of any portion of the distribution not transferred or rolled over. The additional 10 percent tax generally does not apply to payments that are:…