8 Tax Mistakes You Can’t Afford to Make: Annaly Capital Management, Inc. (NLY), American Capital Agency Corp. (AGNC)

Recommendation: You must have enough tax withheld from your paycheck to cover most of your tax liability when you file your return.

If you don’t withhold enough, you’ll pay penalties and interest on what you should have paid in estimated taxes.

Bottom line: It’s too late to fix for the 2012 tax year, but be sure to look up Form 1040-ES to make sure you’re in good shape this year.