Since you qualified for this exception for the FERS or CSRS pension, you should also qualified for the same exception on distributions from the TSP. If the Form 1099-R from the TSP happens to have code 1 instead of code 2, you can claim a code 01 exception to the penalty on line 2 of Form 5329, which TurboTax will give you the opportunity to do. (I don't think that filing Form 5329 is permitted with the free online version of TurboTax, but all other versions of TurboTax support it).
