I'm a W2 Employee and work at a startup. The startup recently had an exit event and everyone in the company had a "cashless exercise" of all of the vested options. The proceeds of that cashless exercise come via a regular paycheck and are thus subject to regular income taxes.
Besides maxing out 401K, HSA, FSA, are there any other options available to me to help me reduce my taxable income for this year, to lower my tax burden as much as possible? Important to note that I only have the remaining days in December 2023 to do something so buying a home and deducting the interest is out of the question.