Received 1099-misc for 409a deferred compensation Money was fica and medicare taxed at time of earned. 1099 has money in box 15B only and turbo tax won't allow

I have called help line and received 5 different answers.  most want 1099 to have money amount in 15B and box 7 - but that wants to tax the amount with fica and medicare again.  We have already paid fica and medicare.  No longer an employee of company, so can not received a W-2