Different expert here. If your child is deemed "totally and permantely disabled", then you may claim her as a Qualifying Child
for tax purpose regardless of her age since she is still living at home with your. Please see below::
- Child, Permanently and totally disabled.
This is a fine distinction I know, but it can make a huge difference on your taxes. In most cases the IRS requires that the state recoginize
The above expert was correct in that you need some sort of proof that your daughter is disabled, and in many cases that means that your child is collecting Social Security Disability, although as the expert mentioned above, a doctor's note stating that your daughter is disabled is also sufficient.
Since you may claim your daughter under the Qualifying Child rules, this means that you may possibly claim the Earned Income Credit if your Adjusted Gross Income meets the requirements. Please see below:
Tax Topics - Topic 601 Earned Income Credit
Also, you mentioned that due to your daughter's condition, she may not leave the house. As your qualifying child, you may claim The Child Care expenses you pay out pocket for any one who comes in to stay with your daughter while you can't . Please see page 1 from below:
2011 Instruction 2441
One last item. The rules re: support for qualifying children changed a little while back. While it used to be that you had to provide at least 51% of their support in order to claim them, now you may claim your child as along as the CHILD does not provide more than 51% of their own support. Please see below:
Support Test (To Be a Qualifying Child)
I hope this helps.