(Image credit: Getty Images) When the One Big Beautiful Bill Act was signed into law last summer, it introduced tax changes poised to impact the charitable giving landscape. In response, many donors and their advisers acted fast to adjust their tax planning. Now, investors and donors should look ahead and determine the strategies needed to achieve tax management and charitable giving goals this year and beyond. For donors itemizing deductions, the biggest changes affecting charitable giving involve both ends of deduction limits. The law created a new floor on charitable deductions, wherein only gifts exceeding 0.5% of adjusted gross income can be deducted. From just $107.88 $24.99 for Kiplinger Personal Finance Become a smarter, better informed investor.…