Tips and the taxability of social security benefits: For single filers: If provisional income is less than $25,000, then the benefits are tax-free. If provisional income is between $25,000 and $34,000, then up to 50% of benefits is taxable. If provisional income is over $34,000, up to 85% is taxed.
For joint filers: If provisional income is less than $32,000, then the benefits
are tax-free. If provisional income is between $32,000 and $44,000, then up to half
of benefits is taxable. If provisional income is over $44,000, up to 85% is taxed.
If you want federal income tax withheld, complete IRS Form W-4V
to have 7%, 10%, 12% or 22% of your monthly Social Security benefits taken out.