When it comes to year-end tax planning, you need to have a good understanding of both your own financial situation and the tax rules that apply. For some, that’s going to be a little challenging this year because a host of popular tax provisions, commonly referred to as “tax extenders,” expired at the end of 2013. And while it remains possible that Congress could retroactively extend some or all of the expired provisions, you can’t count on it. Despite this uncertainty, the window of opportunity for many tax-saving moves closes on December 31, so it’s important to evaluate your tax situation now, while there’s still time to affect your bottom line for the 2014 tax year.