Any withholding you have will cover the tax on all your income. So if you have enough withholding from SSDI etc. you don't need to send in estimated payments for the rental income. It goes by your total income for the year. Your SSDI might not be taxable. it depends on your total income. But you can still have withholding taken out of it. But not state withholding since SS and SSDI are not taxable on the state return. So you may need to send in estimates for a State tax due.
Up to 85% of Social Security and SSDI 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
