Why doesn't the IRS Form 1098 include all the interest I paid during the calendar year?

Form 1098 only reports mortgage interest payments that we received during the calendar year.  If you made interest payments to another company, you may receive a separate Form 1098 from them. 

Additionally, any mortgage interest paid using funds from the Homeowner Assistance Fund Program (HAF) is excluded from the total reported on Form 1098.