By Andy Sullivan Dec 29 (Reuters) - Economists see the tax cuts in Trump's One Big Beautiful Bill as a principal driver of the U.S. economy in 2026, both for individuals and businesses. Here's some detail about what's in store. INDIVIDUAL ​TAX CUTS A range of changes in individual tax rates and breaks could boost household war chests in early 2026 ‌through a combination of larger refunds during the filing season and larger take-home income as paycheck withholding levels are reset to account for the chan ...