diff --git a/cogs/commands/submission.py b/cogs/commands/submission.py
new file mode 100644
index 0000000..2266e71
--- /dev/null
+++ b/cogs/commands/submission.py
@@ -0,0 +1,218 @@
+"""Contains command for submitting a score."""
+
+import re
+
+import nextcord
+from nextcord.ext import commands
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from cogs.submission.verification_view import VerificationView
+from database_setup.sql_data_classes import Category, CategoryGroup, Guild, Submission, engine
+from utilities.utils import autofill_categories, autofill_groups, submit_score
+
+
+class SubmissionCog(commands.Cog):
+    """Class holds command for submitting a score."""
+
+    def __init__(self) -> None:
+        return
+
+    @nextcord.slash_command()
+    async def submit(
+        self,
+        interaction: nextcord.Interaction,
+        group_id: str = nextcord.SlashOption(name="Group", required=True, description="Group to submit score to."),
+        category_id: str = nextcord.SlashOption(
+            name="Category", required=True, description="Category to submit score to."
+        ),
+        score: str = nextcord.SlashOption(required=True, description="Score to submit"),
+        username: str = nextcord.SlashOption(
+            required=False, description="Modified username if submitting under not your discord name."
+        ),
+    ) -> None:
+        """
+        Submit a highscore.
+
+        Sets the username if one isn't passed in. Checks if a submission needs verified. Ensures that the score is
+        following the correct format. Then either creates the verification request or submits score if verification
+        isn't required.
+
+        Args:
+            interaction (nextcord.Interaction): Interaction of the command.
+            group_id (str): Is SlashOption. Group that the score category belongs in.
+            category_id (str): Is SlashOption. Category to submit the score in.
+            score (str): Is SlashOption. The score.
+            username (str, optional): Is SlashOption. Username to associate with the score.
+        """
+        # fill out username if not passed in
+        if username is None:
+            username = interaction.user.display_name
+
+        with Session(engine) as session:
+            stmt = (
+                select(Category).where(Category.GroupId == int(group_id)).where(Category.CategoryId == int(category_id))
+            )
+
+            category: Category = session.scalar(stmt)
+
+            # check if verification is required. if no picture, deny
+            if category.IsValidated and not interaction.message.attachments > 0:
+                await interaction.response.send_message(
+                    "This category required verification. Please attach a picture and re-submit.", ephemeral=True
+                )
+                return
+
+            # check with regex if score is in correct format
+            score = await self.verify_score(interaction, score, is_time_record=category.IsTimeRecord)
+
+            # check if verify_score was successful. It replies with corrections required itself.
+            if score is None:
+                return
+
+            # Create submission verification request or submit score if verification not needed.
+            if not category.IsValidated:
+                await submit_score(interaction, group_id, category_id, username, score)
+                await interaction.response.send_message("Score has been submitted!", ephemeral=True)
+                return
+
+            stmt = select(Guild.VerificationChannel).where(Guild.GuildId == interaction.guild_id)
+            verification_channel_id = session.scalar(stmt)
+
+            channel = interaction.guild.get_channel(verification_channel_id)
+
+            if channel is None:
+                error_response = (
+                    "Registered Verification channel does not exist or was never registered. Contact server admins."
+                )
+                await interaction.response.send_message(error_response, ephemeral=True)
+
+            # Send the verification message to admins
+            verification_message = await channel.send(
+                files=[await attach.to_file() for attach in interaction.message.attachments],
+                view=VerificationView(),
+                embeds=self.create_embed(interaction, group_id, category_id, score, username, session),
+                content=f"Submission from <@{interaction.user.id}>.",
+            )
+            await interaction.response.send_message(content="Score submitted!", ephemeral=True)
+
+            # Save the submission data for later use.
+            submission: Submission = Submission(
+                CategoryId=category_id,
+                GroupId=group_id,
+                GuildId=interaction.guild_id,
+                MessageId=verification_message.id,
+                Score=score,
+                UserName=username,
+            )
+
+            session.add(submission)
+            session.commit()
+
+    def create_embed(  # noqa: PLR0913
+        self,
+        interaction: nextcord.Interaction,
+        group_id: str,
+        category_id: str,
+        score: str,
+        username: str,
+        session: Session,
+    ) -> nextcord.Embed:
+        """
+        Creates an embed containing submission data for human verification.
+
+        Args:
+            interaction (nextcord.Interaction): Discord interaction of the command.
+            group_id (str): Used to get group name.
+            category_id (str): Used to get category name.
+            score (str): Score to set.
+            username (str): Username to set.
+            session (Session): Open connection to database.
+
+        Returns:
+            nextcord.Embed: Embed containing human readable submission data.
+        """
+        embed = nextcord.Embed(title="Highscores Submission", description="Review fields and accept.")
+        embed.add_field(name="User Name", value=username, inline=False)
+
+        # Get group name from database
+        stmt = (
+            select(CategoryGroup.GroupName)
+            .where(CategoryGroup.GuildId == interaction.guild_id)
+            .where(CategoryGroup.GroupId == group_id)
+        )
+        embed.add_field(name="Group", value=session.scalar(stmt), inline=False)
+
+        # Get category name from database
+        stmt = (
+            select(Category.CategoryName).where(Category.GroupId == group_id).where(Category.CategoryId == category_id)
+        )
+        embed.add_field(name="Category", value=session.scalar(stmt), inline=False)
+        embed.add_field(name="Score", value=score, inline=False)
+        return embed
+
+    async def verify_score(self, interaction: nextcord.Interaction, score: str, *, is_time_record: bool) -> str | None:
+        """
+        Uses regex to verify that scores are in the correct format.
+
+        Handles responding to the interaction if the format is incorrect. Also standardizes the time record.
+
+        Args:
+            interaction (nextcord.Interaction): Discord interaction of the command.
+            score (str): String representation of the score being verified.
+            is_time_record (bool): Whether the score needs to be verified/formatted as a time record.
+
+        Returns:
+            str | None: String of corrected score. None if formatted incorrectly.
+        """
+        time_regex = re.search("^([0-9]{1,2}:[0-9]|[0-9])?[0-9](\\.[0-9])?$", score)
+        int_regex = re.search("^[0-9]+$", score)
+        if time_regex is None and is_time_record:
+            await interaction.response.send_message(
+                "Time record must follow format MM:SS.ms, SS.ms, or SS.", ephemeral=True
+            )
+            return None
+        if int_regex is None and not is_time_record:
+            await interaction.response.send_message("Number record must only be number.", ephemeral=True)
+            return None
+        if is_time_record:
+            # standardize time score format.
+            if re.search("^[1-9]?[0-9]:[0-9]{2}(\\.[0-9])?$", score):
+                # score is already fine.
+                pass
+            elif re.search("^[0-9]{2}(\\.[0-9])?$", score):
+                # need to add leading colon and 0
+                score = "0:" + score
+            elif re.search("^[0-9](\\.[0-9])?$", score):
+                # need to add 0 in seconds and leading colon and 0
+                score = "0:0" + score
+            elif re.search("^[0]?[0-9]:[0-9]{2}(\\.[0-9])?$", score):
+                # if there is a minute 10ths place 0, remove
+                score = score.lstrip("0")
+
+        return score
+
+    @submit.on_autocomplete("group_id")
+    async def group_autocomplete(self, interaction: nextcord.Interaction, group_id: str) -> None:
+        """
+        Autocomplete function for table names.
+
+        Args:
+            interaction (nextcord.Interaction): Interaction that invoked the command.
+            group_id (str): String to be autocompleted with Group name.
+        """
+        await interaction.response.send_autocomplete(autofill_groups(interaction.guild_id, group_id))
+
+    @submit.on_autocomplete("category_id")
+    async def category_autocomplete(self, interaction: nextcord.Interaction, category_id: str, group_id: str) -> None:
+        """
+        Autocomplete function for category names.
+
+        Args:
+            interaction (nextcord.Interaction): Interaction that invoked the command.
+            category_id (str): String to be autocompleted with Category name.
+            group_id (str): Group to find Category from.
+        """
+        await interaction.response.send_autocomplete(
+            autofill_categories(interaction.guild_id, int(group_id), category_id)
+        )