Where do I enter income from royalties?

Which version do you have?  Try here,

Go to Federal Taxes tab

Wages and Income

Choose Explore on my own (if it comes up)

Scroll way down to Rentals and Royalties - click start or update

You generally report royalties in Part I of Schedule E (Form 1040), Supplemental Income and Loss. However, if you hold an operating oil, gas, or mineral interest report your income and expenses on Schedule C.

schedule E is under wages and income > Rental properties and royalties

schedule C is below this under Business items