I've successfully imported data form IB, Scottrade & ShareBuilder to my TurboTax Basic 2010. Actually, it's a free version I downloaded from TurboTax official website several months ago. It also generates Schedule D, Schedule C, Form 6251 AMT etc. I don't think I need to upgrade to TurboTax Premier.
Tip: Don't import txf files from your broker directly via TurboTax. Download to your local drive first, then import to TurboTax.
Merrill Lynch/BOA doesn't provide txf files. I'm still working on it.