here are the codes but they should be on the 1099-B - maybe not by each trade but possibly at the start of each section
A = short-term trade with sales proceeds and cost basis reported to the IRS
B = short-term trade with sales proceeds but not cost basis reported to the IRS
C = short-term trade with neither sales proceeds nor cost basis reported to the IRS
D = same as A but for long-term trades
E = same as B but for long-term trades
F = same as C but for long-term trades
