Where can I find the section for mineral royalty depreciation/depletion? Not sure which term is correct.

Mineral royalties are eligible for depletion, which is calculated on the income reported to you. 

Royalty Income and Deductions are reported on Schedule E (Rental Properties & Royalties). You will need the Premier version of TurboTax Online in order to include this schedule with your return. If you'd rather stick with Deluxe, you will need the CD/Download version for desktop, which includes Schedule E.

If you enter Form 1099-MISC with Royalties in Box 2, TurboTax will create Schedule E for you.

The easiest way to find Schedule E in TurboTax Online is to find Tax Tools in the left column >> Tools >> Topic Search. Type in "schedule e", click the topic in the list, then Go. In TurboTax Desktop, use the Topic List found in the header.

As you work through the Schedule E interview, if TurboTax prompts you to enter an address for the property, use the actual address if you know it (look on the property tax bill if you have one). Or use your own address. The IRS instructions say address lines 1 and 2 should be left blank, but sometimes the program won't let you continue without an address.

For royalty properties, the address portion on line 1 and all of line 2 should be left blank - enter code “6” for royalty property (reference https://www.irs.gov/instructions/i1040se#d0e468).