Julián Castro. August 2019. Julián Castro, former Secretary of Housing and Urban Development and candidate for the Democratic nomination for President of the United States, plans to expand the Child Tax Credit to $3,000 per child; and would make the credit fully refundable, indexed for inflation, and available in monthly installments. His plan would also restructure the Earned Income Tax Credit to include all dependents, low-income independent students, and workers below the age of 25 and above the age of 65.