Regarding 529 plan contributions, how do I tell TurboTax that I contributed to more than one account?? It only asked me to state my 529 contribution as a total..

[Hal_Al]

There is no federal deduction. If your state has one, it's most likely only interested in the total. My state (OH), TurboTax asks for a separate entry by beneficiary. 

Either way, just enter what he program asks for.

[billmarmon]

529 contributions can be up to 2500 per account.   Multiple accounts shoud be aggregated.