This is an automatic payment you get from the U.S. government if you have children. It's based on your tax filing. Find answers to questions about how it works, when to expect a payment, and what to do if you have not filed taxes yet: The Child Tax Credit | The White House.
Legal Aid's Low-Income Tax Payer clinic can help you fill out the non-filer information to get your payments. To get help, call 612-334-5970. Free translation and interpreter services are available.