CLDC-4204: Renumber fields to match spec

app/services/bulk_upload/sales/year2026/csv_parser.rb

@@ -3,7 +3,6 @@ require "csv"
 class BulkUpload::Sales::Year2026::CsvParser
   include CollectionTimeHelper
 
-  # TODO: CLDC-4162: Update when 2026 format is known
   FIELDS = 136
   FORM_YEAR = 2026
 
@@ -26,8 +25,7 @@ class BulkUpload::Sales::Year2026::CsvParser
   end
 
   def cols
-    # TODO: CLDC-4162: Update when 2026 format is known
-    @cols ||= ("A".."EF").to_a
+    @cols ||= ("A".."EG").to_a
   end
 
   def row_parsers

spec/services/bulk_upload/sales/year2026/csv_parser_spec.rb

@@ -166,7 +166,7 @@ RSpec.describe BulkUpload::Sales::Year2026::CsvParser do
 
       it "returns correct column" do
         expect(service.column_for_field("field_1")).to eql("B")
-        expect(service.column_for_field("field_99")).to eql("CV")
+        expect(service.column_for_field("field_126")).to eql("DW")
       end
     end
   end