Not quite. The tax take would double from a consumption tax.

Total retail sales (https://www.statista.com/statistics/443495/total-us-retail-s...) is c. 6T.

Assuming that most of the 4T comes from taxing the activity represented by retail sales (a very safe bet), you need to get most of 4T from 6T. Ie., you're basically doubling the prices of retail goods -- including food.