To my understanding, as of January 2006, the Government has removed all monthly contribution limits on the federal 401k or "Thrift Savings Plan." Apparently, my entire biweekly paycheck, up to an annual total of $15,000, can be deposited. There is also a provision allowing for lump sum deposits. If I understand correctly, I can either put in the monthly pretax contributions or do one or a number of lump sum deposits. If I were to choose the lump sum route, which would assumingly come from after tax monies, is there any way of making back that money that was taxed? The way I see it, seeing of how the benefit of the TSP/401k/Traditional IRA is that contributions are pretax, shouldn't there be some way of making the aftertax lump sum payments have the same benefit? Is there a way to account for this on my tax return?

thanks in advance
goody14