You would receive advance payments by adding them in the Child Tax Update Portal. They will be adding that function in late summer, but you can set up an account there now so that you're ready to go when they do. However, if they don't have SSNs, I doubt if you'll be able to do it in the portal. In that case, you'll get the full amount of the credit added to the return you'll file this spring.
Nick K, EA
