Do you mean Social Security benefits or ssi supplemental security income? They are different. If you file a Joint return all income for both of you is included. If he passes then you are only taxed on your income after the year of death.
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
