You don't include their income on your return. It would only go on their return if they are required to file one. They don't have to file if they only have Social Security or W2 income under 12,550 but can file to get back any withholding taken out in boxes 2 or 17. But you don't get boxes 4 or 6 back. If they got a 1099NEC for it they do have to file a tax return for it.
Be sure on the dependent return you check the box that says you can be claimed on someone else’s return. If their only income is W2 and under 12,550 they do not have to file a return except to get back any withholding taken out.
You are using the Desktop program? This is important. If you do another return for someone else like your child and their name is the same or similar to yours then it might overwrite your return. You have to save each return with different names so you can tell them apart. Like if your name is John and your son is also named John it will save them with the same name so the second one will overwrite the first return. Go to File-SaveAs and give it a unique name.
Filing requirements for a dependent
https://ttlc.intuit.com/community/children-dependents/help/do-i-need-to-file-my-own-taxes-if-i-m-a-d...
