Why did Turbo Tax not auto fill the depletion on Schedule E this year? I am a royalty owner if that makes a difference?

Yes, you are correct that TurboTax automatically calculates Depletion when you enter your 1099-Misc for Royalty Income.

You can enter it yourself, however.  The amount is 15% of your Royalty Income.

Here's more info:

https://ttlc.intuit.com/replies/7237445