Claim disabled spouse

[mduane79]

my wife was on disability from work

[jerry2000]

You can not claim a spouse as a dependent.
See page 11 of IRS Publication 501 which says:

“Your spouse is never considered your dependent.”

You can find IRS Pub 501 at this link:
https://www.irs.gov/pub/irs-pdf/p501.pdf

You can file as Married Filing Jointly even if one of you has little or no income. That filing status gives you a personal exemption for each of you, the largest standard deduction and the lowest tax rates.