WASHINGTON - Congress approved Tuesday the extension of the tax deduction for mortgage insurance for loans closed through 2010. President Bush is expected to sign the bill this week. Online mortgage applications are quick. An online application form takes about four minutes of your filling it up. Approval can then be given within 24 hours. This is a far cry from the several business days it usually takes for traditional mortgage applications to be approved. In this regard, online mortgages are less time-consuming and even initially paper-free.