Following is a list of States in Germany along with their abbreviations.  The full name or abbreviation is accepted in the State_Province field in your CSV file when you upload.

State Abbreviation Alternate Abbreviation
Baden-Württemberg BW
Bavaria BY
Berlin BE
Brandenburg BB
Bremen HB
Hamburg HH
Hesse HE
Lower Saxony NI
Mecklenburg-Vorpommern MV
North Rhine-Westphalia NW
Rhineland-Palatinate RP
Saarland SL
Saxony SN
Saxony-Anhalt ST
Schleswig-Holstein SH
Thuringia TH