diff --git a/docs/UserGuide.md b/docs/UserGuide.md
index 5b45af49550..dce5eb5236c 100644
--- a/docs/UserGuide.md
+++ b/docs/UserGuide.md
@@ -340,7 +340,7 @@ Most commands given in the user guide utilise various parameters which are also
 |       MIDTERMS       |   `mt/`    |                                                 `editgradedtest`                                                  | The Score of a MidTerms exam. <ul><li>Score should be a positive number.</li></ul>                                                                                                                                                                                                                                                                             |
 |        FINALS        |    `f/`    |                                                 `editgradedtest`                                                  | The Score of a Finals exam. <ul><li>Score should be a positive number.</li></ul>                                                                                                                                                                                                                                                                               |
 |    PRACTICAL_EXAM    |   `pe/`    |                                                 `editgradedtest`                                                  | The Score of a Practical exam. <ul><li>Score should be a positive number.</li></ul>                                                                                                                                                                                                                                                                            |
-|      ASSIGNMENT      |   `as/`    |                                     `deletecomment` `editcomment` `editgrade`                                     | The Name of an Assignment. <ul><li>Name should exist in the list of possible assignments.</li></ul>                                                                                                                                                                                                                                                            |
+|      ASSIGNMENT      |   `as/`    |                              `editcomment` `deletecomment` `editgrade` `deletegrade`                              | The Name of an Assignment. <ul><li>Name should exist in the list of possible assignments.</li></ul>                                                                                                                                                                                                                                                            |
 |        GRADE         |    `g/`    |                                                    `editgrade`                                                    | The Grade of an Assignment. <ul><li>Grade should be a positive number.</li><li>Grade should be less than or equal to (max grade + 75).</li><li>Grade should not have leading 0's.</li></ul>                                                                                                                                                                    |
 |       COMMENT        |    `c/`    |                                                   `editcomment`                                                   | The Comment of an Assignment. <ul><li>Comment should be less than 200 characters.</li><li>Comment should not be empty.</ul>                                                                                                                                                                                                                                    |
 |         DATE         |    `d/`    |                                       `addtask` `viewtasks` `createconsult`                                       | The Date.  <ul><li>The format must be dd/MM/yyyy.</li></ul>                                                                                                                                                                                                                                                                                                    |
diff --git a/src/main/java/seedu/address/logic/parser/ParserUtil.java b/src/main/java/seedu/address/logic/parser/ParserUtil.java
index 6d7bd53a8ea..36b9a8f2c1a 100644
--- a/src/main/java/seedu/address/logic/parser/ParserUtil.java
+++ b/src/main/java/seedu/address/logic/parser/ParserUtil.java
@@ -244,7 +244,7 @@ public static AttendancePresence parseAttendancePresence(String attendancePresen
     }
 
     /**
-     * Parses a {@code String taskName} into a {@code TaskName}.
+     * Parses a {@code String name} into a {@code TaskName}.
      * Leading and trailing whitespaces will be trimmed.
      *
      * @throws ParseException if the given {@code name} is invalid.
@@ -259,7 +259,7 @@ public static TaskName parseTaskName(String name) throws ParseException {
     }
 
     /**
-     * Parses a {@code String taskDescription} into a {@code TaskDescription}.
+     * Parses a {@code String name} into a {@code TaskDescription}.
      * Leading and trailing whitespaces will be trimmed.
      *
      * @throws ParseException if the given {@code name} is invalid.
@@ -378,7 +378,7 @@ public static void validateGradedTestField(String fieldName, String fieldValue)
     }
 
     /**
-     * Parses {@code Collection<String> gradedTest} into a {@code Set<GradedTest>}.
+     * Parses {@code Collection<String> gradedTests} into a {@code Set<GradedTest>}.
      */
     public static Set<GradedTest> parseGradedTests(Collection<String> gradedTests) throws ParseException {
         requireNonNull(gradedTests);
@@ -390,7 +390,7 @@ public static Set<GradedTest> parseGradedTests(Collection<String> gradedTests) t
     }
 
     /**
-     * Parses a {@code String readingAssessment} into a {@code readingAssessment}.
+     * Parses a {@code String name} into a {@code readingAssessment}.
      * Leading and trailing whitespaces will be trimmed.
      *
      * @throws ParseException if the given {@code name} is invalid.
@@ -405,7 +405,7 @@ public static ReadingAssessment1 parseReadingAssessment1(String name) throws Par
     }
 
     /**
-     * Parses a {@code String readingAssessment} into a {@code readingAssessment}.
+     * Parses a {@code String name} into a {@code readingAssessment}.
      * Leading and trailing whitespaces will be trimmed.
      *
      * @throws ParseException if the given {@code name} is invalid.
@@ -420,7 +420,7 @@ public static ReadingAssessment2 parseReadingAssessment2(String name) throws Par
     }
 
     /**
-     * Parses a {@code String readingAssessment} into a {@code readingAssessment}.
+     * Parses a {@code String name} into a {@code readingAssessment}.
      * Leading and trailing whitespaces will be trimmed.
      *
      * @throws ParseException if the given {@code name} is invalid.
@@ -435,7 +435,7 @@ public static MidTerms parseMidTerms(String name) throws ParseException {
     }
 
     /**
-     * Parses a {@code String finals} into a {@code finals}.
+     * Parses a {@code String name} into a {@code finals}.
      * Leading and trailing whitespaces will be trimmed.
      *
      * @throws ParseException if the given {@code name} is invalid.
@@ -450,7 +450,7 @@ public static Finals parseFinals(String name) throws ParseException {
     }
 
     /**
-     * Parses a {@code String practicalExam} into a {@code practicalExam}.
+     * Parses a {@code String name} into a {@code practicalExam}.
      * Leading and trailing whitespaces will be trimmed.
      *
      * @throws ParseException if the given {@code name} is invalid.
@@ -465,7 +465,7 @@ public static PracticalExam parsePracticalExam(String name) throws ParseExceptio
     }
 
     /**
-     * Parses a {@code String priority} into a {@code TaskPriority}.
+     * Parses a {@code String name} into a {@code TaskPriority}.
      * Leading and trailing whitespaces will be trimmed.
      * String will be uppercase.
      *
@@ -483,7 +483,7 @@ public static TaskPriority parseTaskPriority(String name) throws ParseException
     }
 
     /**
-     * Parses a {@code String progress} into a {@code TaskProgress}.
+     * Parses a {@code String name} into a {@code TaskProgress}.
      * Leading and trailing whitespaces will be trimmed.
      * String will be uppercase.
      *
@@ -501,7 +501,7 @@ public static TaskProgress parseTaskProgress(String name) throws ParseException
     }
 
     /**
-     * Parses a {@code String assignmentName} into a {@code AssignmentName}.
+     * Parses a {@code String name} into a {@code AssignmentName}.
      *
      * @throws ParseException if the given {@code name} is invalid.
      */
diff --git a/src/main/java/seedu/address/model/task/TaskDescription.java b/src/main/java/seedu/address/model/task/TaskDescription.java
index 1af82efa718..69b36b8d912 100644
--- a/src/main/java/seedu/address/model/task/TaskDescription.java
+++ b/src/main/java/seedu/address/model/task/TaskDescription.java
@@ -26,7 +26,7 @@ public TaskDescription(String description) {
     }
 
     /**
-     * Returns true if a given string is a valid tag name.
+     * Returns true if a given string is a valid task description.
      */
     public static boolean isValidDescription(String test) {
         return test.matches(VALIDATION_REGEX);