Social Security Questions? Ask a Social Security Expert
The best way is to visit a local social security administration office and make inquiry with a representative face to face. Usually, the tax withheld is only for the federal tax. You may request 5%, 10% or 20% withheld for example.
As to the IRS or state tax for 2016, you can ask your tax return preparer to prepare you estimated tax vouchers to pay the IRS and the State. Then, you can send in check with the estimated tax payment vouchers for 2016. The tax return preparer may or may not charge a small service fee. But you will be doing this correctly for this year.
Please feel free to follow up.
Fiona Chen, MPA, Ph.D., CPA, ABV, CFF, CITP