Typically, escrowed property taxes are reported on box 10 of Form 1098. If you do not see it there, you could log on to your mortgage servicer's website, and look at your transaction history. You could also contact the tax collector where you live.
Since you just bought the home, don't forget to also include the property taxes you paid at closing, from your settlement sheet, HUD-1.
Here is some more information you may find helpful: don't
