According to Schwab, the IRS has changed the 8849 forms as of Jan 14,
2014 by adding three new boxes - D, E, F. However, the instructions provided by Schwab in the release of their 1099B's will not reflect the new boxes.
Their release as of today 1/31/2014 state that where their instructions call for using Box A, use Box D, for Box B use box E and for Box C use Box F.
Don't know if other brokers will take the same approach or correct the instructions they send out with the 1099B