(Image credit: Getty Images) The One Big Beautiful Bill Act ( OBBBA ) opens up several planning opportunities that could make a real difference in what you keep in your pocket — not just this year, but for years to come. If you're like our clients, whom we call Midwestern Millionaires — hardworking, frugal and diligent savers with $1 million or more saved (I wrote a book on this that you can request here ) — these are five of the most important provisions to understand for how they may affect your long-term tax strategy. 1. Lower tax rates aren't going away (for now) One of the biggest concerns we hear from clients is whether today's historically low tax rates are about to disappear. Current legislation signals that lower marginal tax rates are likely here to stay longer than previously expected, at least for now. From just $107.88 $24.99 for Kiplinger Personal Finance Become a smarter, better informed investor.…