I have orthodontics and dental expenses to claim but for different payees. Do I submit them together or separate? How would I deduct the 0.03% if separate?

You can submit them whichever way you would like to. You don’t need to worry about deducting 3% since TurboTax will do it for you.

I hope this answer helps!

Here is a great FAQ that shows you how to enter your medical expenses on TurboTax Online and CD/download.