How do i claim my disabled wife as a dependent

[VolvoGirl]

You don't.  A spouse is never a dependent.  You just file a Joint return even if she  has no income which is better than claiming a dependent.  You will have to enter her SSA-1099 from Social Security if she has SS or SSDI.

[xmasbaby0]

A spouse is never claimed as a dependent.  File a joint return.

Married Filing Jointly is usually better, even if one spouse had little or no income. When you file a joint return, you and your spouse will get the married filing jointly standard deduction of $29,200 (+ $1550 for each spouse 65 or older)  for 2024. You are eligible for more credits including education credits, earned income credit, child and dependent care credit, and a larger income limit to receive the child tax credit. 

[DoninGA]

A spouse can never be claimed as a dependent.  You should be filing your tax return as Married Filing Jointly even if one spouse has little or no income.  You receive the highest Standard Deduction and your tax brackets are lower then any other type of filing status.