Form 1098 from different lenders may read slightly different.  Often if there is not a specific box showing Real Estate Taxes paid, if may be toward the bottom of the statement under the Escrow Reconciliation area as Taxes Paid.  Some lenders report Real Estate Taxes paid on the back side of the statement.

If you cannot locate the amount of the real estate taxes paid anywhere on your Form 1098, contact your local city or county assessor and get a receipt of real estate taxes paid for the year.