“When the TCJA passed, analysts projected that it would add to the budget deficit and national debt—and it did. But those problems were more easily waved away when the country was running significantly smaller annual deficits and the debt-to-GDP ratio wasn’t reaching levels unseen since the height of World War II.
A full extension of the TCJA would add another $4.6 trillion to the deficit over the next 10 years, the Congressional Budget Office projects.”