If all you had was back Taxes, and you paid them, then you are Okay.
If you are also behind on the Mortgage, that is a separate problem.
If the Lender is still trying to Foreclose, that is a separate problem.
If you haven't been paying for Insurance, that is a separate problem.
If you need a Lawyer, see one.
Your rights are determined based on the totality of facts regarding your situation. Trulia is not a legal Q&A blog. You should instead consult with a Real Estate Attorney to decide what action(s) may be warranted at this time.