I am not a tax professional, but I did just do my backdoor Roth in TurboTax.

It sounds like you did it right. You claim the nondeductable contribution on your 2016 taxes, and the conversion on your 2017 taxes. Your initial basis is $0. Turbo tax adds your contribution onto this basis.

So assuming you do another contribution and conversion in 2017 for 2017 tax year, next year you'll get a 1099-R for $11,000, and claim a basis of $5,500.