1. Although these sections still state that such certificate should be attached with the return of income, the return itself from Asst Yr 2007-08 has gone under a total change and no documents are to be enclosed with the return. This must be unintended confusion by law makers. In due course , there may be amendment to these provisions .However, in any case I feel you will have to get these ailments certified and then claim the deduction. The certificates should be preserved with you for future requirements, if ever department wants to see it.
Your search for prescribed forms for disability certificates under section 80DD or 80DDB or 80U ends here. Three sections under I T Act prescribes for deduction on account of medical reasons. Section 80DD , sec. 80DDB and section 80U . Two important points need mention