Although the April 15 IRS tax deadline has passed, taxpayers in Delaware, Iowa, Virginia, Louisiana, and South Carolina are still on the hook for their state returns — or have just received extra time. It has been a tumultuous tax season. The 2025 Trump tax bill not only overhauled federal rules but also prompted state lawmakers to wrestle with whether to adopt federal tax code changes. While these updates may have yielded new tax savings for some taxpayers who live in states that adopted them, the new rules also led to state refund delays , even leading one state tax agency to move its filing deadline as far as October. From just $107.88 $24.99 for Kiplinger Personal Finance Become a smarter, better informed investor. Subscribe from just $107.88 $24.99, plus get up to 4 Special Issues CLICK FOR FREE ISSUE Sign up for Kiplinger’s Free Newsletters Profit and prosper with the best of expert advice on investing, taxes, retirement, personal finance and more - straight to your e-mail.…