Even as Congress failed to renew the expanded Child Tax Credit, millions of Americans can still benefit from it. The monthly payments of $300 to $350 many families received last year covered only half of the expanded credit, part of President Joe Biden’s $1.9 trillion coronavirus stimulus law. When they file their 2021 federal income tax returns, Americans can claim the rest of the credit of $3,600 for children under 6 and $3,000 for children between 6 and 17, or the earned income tax credit of up to $1,500 for those without children. The tax cuts benefitted 1.6 million New Jersey children and…