Something this important should be discussed in person or over the phone with a good qualified tax preparer.
Are cash bonuses subject to FICA. IRS Publicationd seems to be unclear (me and my mind). According to CPA, Steve Trojan it is. Could you give me a source, I couldn't find it in IRS Publication 17 or IRS Publication 15?
Yes ... It is covered in Publication 15, under Supplemental Income.