"I do not believe that the TSP is following 25 CFR Section1.401(c)(2)(i) IRS rules for calculating RMDs for participants who have a sole beneficiary spouse that is 10 years or more younger."
That is true, but nothing in the tax code limits the amount that the TSP can force you to take out. As Bsch4477 said, you have 60 days to roll over the amount distributed that is in excess of the true RMD amount based on your circumstances. As I said previously, when TurboTax asks the amount that you were required to take from the TSP, enter no more than the amount that you determined from the Joint and Last Survivor Life Expectancy table so that TurboTax does not block you from reporting the portion rolled over.
