Amending taxes can I qualify for child taxes still ?

Hello this was my first time filling in my own I have always went to a tax office. I missed my other income that I was unaware I could claim until after I have already filed. I did not make enough the first time for the child tax credit for 2023 but when I add the new income I made enough, can I still claim the child credit for 2023 when I amend my taxes? And how can I add income that was paid to me from a business of my friend ? She sent it to my account ? But the amounts along with what I spent for the jobs added to be enough to claim .