Wrong.
How to Deduct Mortgage Interest
Mortgage interest is an itemized tax deduction. To deduct your mortgage interest, you must file a Schedule A along with a Form 1040 tax return. Your lender should provide you with a Form 1098 that details how much interest your paid on your mortgage loan during the tax year. Enter the amount reported in Form 1098 on Line 10 of your Schedule A. If you prepaid your January mortgage in December, or if you paid other interest not reported on Form 1098, enter that additional amount on Line 11 of Schedule A.
Semantics.
It's an extra form just like a 1099R, Misc etc.
That is somewhat misleading. Yes, there is an extra form, but there's more to the story. The tax code gives everyone a "standard deduction"; an amount you get regardless of whether you have deductions like mortgage interest or taxes. For 2012 the standard deduction for joint filers is $11,400. Unless you have deductions in excess of that $11,400, you receive no benefit from them. So for instance, if you have a $150,000 mortgage at, say, 4%, you will pay about $6,000 in interest. You also probably have deductible property taxes; say $3,000. Unless you have some other deductible items, you would take the $11,400 already given and you get zero benefit from the mortgage deduction. Even if you have other deductions, you only get a benefit to the extent they exceed the $11,400. I'd be willing to bet that more than half of homeowners get no benefit from their mortgage interest deduction.
Anyway, it's not "unfair" to others to get a mortgage deduction. Renters get a benefit from the fact that their landlords are able to deduct mortgage interest as a business expense, theoretically lowering the amount the landlord needs to charge to make a profit.