401K distribution tax

I took a distribution from a 401K and paid 30% taxes upfront. I've done this same thing in prior years and have never had turbo tax apply a 10% penalty on top of the 30% I already paid.  It's always said "you don't owe any more money on the withdrawal" but not in this years version.  I can't find anything that suggests the rules have changed with regard to this.... is this a glitch in TT?