Redirect a user in a session

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ASP.NET

I have a form that a user can fill out and click submit button to have that data to be saved into the database. At the same time the submit button also Redirects the user back to their welcome page. I have six welcome pages for six different users that are accessed by the user level in the database. When the user logs into the site, depending on their level, will be directed to the welcome page for that user. The user will then be in a Session to where they can click on different links to different forms so they can enter and submit data into the database. While in a Session, how can I get the user back to their own welcome page? I am having trouble on how to write it.

Here is the code for the form with the submit button:

protected void Page_Load(object sender, EventArgs e)
    {
      TextBoxINST_ID.Text = Session["inst_id"].ToString();
    }
protected void ButtonSubmit_Click(object sender, EventArgs e)
    {

        SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DepartConnectionString"].ConnectionString);
        con.Open();


        SqlCommand cmd = new SqlCommand("Insert into Table1 (INST_ID, TOTAL_REVE, INSTRUCTIO, RESEARCH, PUBLIC_SER, ACADEMIC_S, STUDENT_SE, INSTITUTIO, PHYSICAL_P, SCHOLARSHI, AUXILIARY_, HOSPITALS, INDEPENDEN, OTHEREXP, TOTASSETS, TOTLIABILITY, NoNEXPPERMRESASSETS, EXPENDABLE, UNRNETASSETS, TOTALREV, TUITFEES, CURRDEBT, LONGTERMDEBT) values (@INST_ID, @TOTAL_REVE, @INSTRUCTIO, @RESEARCH, @PUBLIC_SER, @ACADEMIC_S, @STUDENT_SE, @INSTITUTIO, @PHYSICAL_P, @SCHOLARSHI, @AUXILIARY_, @HOSPITALS, @INDEPENDEN, @OTHEREXP, @TOTASSETS, @TOTLIABILITY, @NoNEXPPERMRESASSETS, @EXPENDABLE, @UNRNETASSETS, @TOTALREV, @TUITFEES, @CURRDEBT, @LONGTERMDEBT)", con);
        

        cmd.CommandType = CommandType.Text;

        cmd.Parameters.AddWithValue("@INST_ID", TextBoxINST_ID.Text);
        cmd.Parameters.AddWithValue("@TOTAL_REVE", TextBoxTROA.Text);
        cmd.Parameters.AddWithValue("@INSTRUCTIO", TextBoxInstr.Text);
        cmd.Parameters.AddWithValue("@RESEARCH", TextBoxRes.Text);
        cmd.Parameters.AddWithValue("@PUBLIC_SER", TextBoxPubS.Text);
        cmd.Parameters.AddWithValue("@ACADEMIC_S", TextBoxAcad.Text);
        cmd.Parameters.AddWithValue("@STUDENT_SE", TextBoxStudS.Text);
        cmd.Parameters.AddWithValue("@INSTITUTIO", TextBoxInstiS.Text);
        cmd.Parameters.AddWithValue("@PHYSICAL_P", TextBoxOperM.Text);
        cmd.Parameters.AddWithValue("@SCHOLARSHI", TextBoxSFEDA.Text);
        cmd.Parameters.AddWithValue("@AUXILIARY_", TextBoxAuxE.Text);
        cmd.Parameters.AddWithValue("@HOSPITALS", TextBoxHosS.Text);
        cmd.Parameters.AddWithValue("@INDEPENDEN", TextBoxIndeO.Text);
        cmd.Parameters.AddWithValue("@OTHEREXP", TextBoxOED.Text);
        cmd.Parameters.AddWithValue("@TOTASSETS", TextBoxTA.Text);
        cmd.Parameters.AddWithValue("@TOTLIABILITY", TextBoxTL.Text);
        cmd.Parameters.AddWithValue("@NoNEXPPERMRESASSETS", TextBoxNPRNA.Text);
        cmd.Parameters.AddWithValue("@EXPENDABLE", TextBoxETRNA.Text);
        cmd.Parameters.AddWithValue("@UNRNETASSETS", TextBoxTUNA.Text);
        cmd.Parameters.AddWithValue("@TOTALREV", TextBoxTR.Text);
        cmd.Parameters.AddWithValue("@TUITFEES", TextBoxTFN.Text);
        cmd.Parameters.AddWithValue("@CURRDEBT", TextBoxCD.Text);
        cmd.Parameters.AddWithValue("@LONGTERMDEBT", TextBoxLTD.Text);


        cmd.ExecuteNonQuery();
        con.Close();
        Response.Redirect("Login.aspx");
    }
}

Here is the code for the Login:

<pre lang="c#">
protected void Button1_Click(object sender, EventArgs e)
    {

        SqlConnection con = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["DepartConnectionString"].ConnectionString);
        con.Open();




        if (true)
        {
            SqlCommand level = new SqlCommand("select accessLevel, Password, INST_ID from Table22 where EmailAddress = @EmailAddress AND Password = @Password", con);
            level.Parameters.Add(new SqlParameter("EmailAddress", TextBoxEA.Text));
            level.Parameters.Add(new SqlParameter("Password", TextBoxPW.Text));

            SqlDataReader reader = level.ExecuteReader();
            DataTable dt1 = new DataTable();
            dt1.Load(reader);

            foreach (DataRow dr1 in dt1.Rows)
            {
                int returnedLevel = Convert.ToInt32(dr1[0].ToString());
                int inst_id = Convert.ToInt32(dr1[2].ToString());
                Session["inst_id"] = inst_id;
                    
                if (returnedLevel == 1)
                {
                    Response.Redirect("FormAPublic.aspx");
                }
                else if (returnedLevel == 2)
                {
                    Response.Redirect("FormCPrivateNon.aspx");
                }
                else if (returnedLevel == 3)
                {
                    Response.Redirect("FormDPrivateFor.aspx");
                }
                else if (returnedLevel == 7)
                {
                    Response.Redirect("CEOPage.aspx");
                }
                else if (returnedLevel == 8)
                {
                    Response.Redirect("DBPage.aspx");
                }
                else if (returnedLevel == 11)
                {
                    Response.Redirect("FormAPublicL.aspx");
                }
                else if (returnedLevel == 21)
                {
                    Response.Redirect("FormCPrivateNonL.aspx");
                }
                else if (returnedLevel == 31)
                {
                    Response.Redirect("FormDPrivateForL.aspx");
                }
                
            }