Is SSDI considered taxable or non-taxable?

The Social Security benefits can be taxable if you have enough of other income.

Up to 85% of Social Security Retirement/Disability/Survivors benefits becomes taxable when all your other income plus 1/2 your social security reaches:

• Married Filing Jointly - $32,000
• Single or Head of Household - $25,000
• Married Filing Separately - 0

Up to 85% of Social Security becomes taxable when all your other income plus 1/2 your social security, reaches:

Married Filing Jointly: $32,000

Single or head of household: $25,000

Married Filing Separately: 0

If you only get SS or SSDI it is not taxable and you do not have to file a return.  And there is no benefit in claiming dependents or deductions.   And you can't efile a return with no taxable income.