Deductions & credits

No they are not necessarily listed on your 1098 and Yes, you can use your county tax statement to find the amount you paid in property tax.   They are only on the 1098 if you pay them through an escrow account.   If you paid real estate taxes that are not on Form 1098, enter them on the Real Estate Tax (Property Tax) line instead.     Don't add the amount to the 1098.