The property tax is not required to be printed on a 1098,
although many mortgage companies print it as a matter of courtesy by
finding a blank spot to print "Property taxes $XXXX.XX"
(typically near the bottom).
If this doesn't appear on the front of your 1098, then look on the back,
or even on the second page. Look especially for a listing of transactions related to your escrow
account.
If you can't find the property taxes anywhere on the 1098 or the
accompanying pages, then give your mortgage company a shout.