Most married couples I know choose to burden only one member of the couple with tax return preparation — delegation and work splitting are keys to a happy home life, after all. So, if you are divorcing after a long marriage, you may be doing your own taxes for the first time (or the first in a long time). The U.S. tax code is a mystery to the typical individual. But federal taxes (not to mention state and local taxes) are a big expense for most of us — and it’s hard to be tax-aware when you don’t even know the basic mechanics of the tax system. Here, I’ve put together a primer to get you started on your journey to understanding taxes a little better.