diff --git a/tdrs-backend/tdpservice/parsers/schema_defs/tanf/t7.py b/tdrs-backend/tdpservice/parsers/schema_defs/tanf/t7.py
index ab1129a83..4bfc45343 100644
--- a/tdrs-backend/tdpservice/parsers/schema_defs/tanf/t7.py
+++ b/tdrs-backend/tdpservice/parsers/schema_defs/tanf/t7.py
@@ -29,7 +29,7 @@
               Field(item="3", name='CALENDAR_QUARTER', type='number', startIndex=2, endIndex=7,
                     required=True, validators=[validators.dateYearIsLargerThan(1998),
                                                validators.quarterIsValid()]),
-              TransformField(calendar_quarter_to_rpt_month_year(i % 3), item="3A", name='RPT_MONTH_YEAR', type='number',
+              TransformField(calendar_quarter_to_rpt_month_year((i - 1) % 3), item="3A", name='RPT_MONTH_YEAR', type='number',
                              startIndex=2, endIndex=7, required=True, validators=[validators.dateYearIsLargerThan(1998),
                                                                                   validators.dateMonthIsValid()]),
               Field(item="4", name='TDRS_SECTION_IND', type='string', startIndex=section_ind_index,
diff --git a/tdrs-backend/tdpservice/parsers/test/test_parse.py b/tdrs-backend/tdpservice/parsers/test/test_parse.py
index f52ffc64d..9c785f79f 100644
--- a/tdrs-backend/tdpservice/parsers/test/test_parse.py
+++ b/tdrs-backend/tdpservice/parsers/test/test_parse.py
@@ -854,8 +854,8 @@ def test_parse_tanf_section4_file(tanf_section4_file):
     first = t7_objs.first()
     sixth = t7_objs[5]
 
-    assert first.RPT_MONTH_YEAR == 202012
-    assert sixth.RPT_MONTH_YEAR == 202010
+    assert first.RPT_MONTH_YEAR == 202011
+    assert sixth.RPT_MONTH_YEAR == 202012
 
     assert first.TDRS_SECTION_IND == '2'
     assert sixth.TDRS_SECTION_IND == '2'