AP can perform the entire authorization function or selected portions of the process in cooperation with your host system. And, because the Visa DPS authorization system is flexible, you may customize support to meet your specific business requirements.
If desired, you can request voluntary Federal tax withholding from your monthly Social Security benefits. You may find doing this easier than paying quarterly estimated tax payments. See http://www.socialsecurity.gov/planners/taxwithold.htm.
When completing the W-4V you select a percentage of benefits for tax withholding, not a flat dollar amount. Options are to have 7 percent, 10 percent, 15 percent or 25 percent of your monthly benefit withheld. Voluntary withholding is only for federal taxes, not state or local taxes. Social Security employees cannot provide tax advice.