ExcelVBAについて質問です。

こんな感じでどうでしょうか。

Sub 四角形1_Click()
    Const strRange As String = "C9"     '固定セルの指定
    Const strTitle As String = "C2"     'ファイル名セルの指定
    Dim vntFileName As Variant
    
    vntFileName = Application.GetOpenFilename( _
             FileFilter:="tsvファイル(*.tsv),*.tsv" _
           , FilterIndex:=1 _
           , Title:="tsvファイルを選択してください" _
           , MultiSelect:=False)

    If vntFileName = False Then Exit Sub
       
    ActiveSheet.Range(strRange).Select

    With ActiveSheet.QueryTables.Add(Connection:="TEXT;" & vntFileName, Destination:=Range(strRange))
        .FieldNames = True
        .RowNumbers = False
        .FillAdjacentFormulas = False
        .PreserveFormatting = True
        .RefreshOnFileOpen = False
        .RefreshStyle = xlOverwriteCells
        .SavePassword = False
        .SaveData = True
        .AdjustColumnWidth = False
        .RefreshPeriod = 0
        .TextFilePromptOnRefresh = False
        .TextFilePlatform = 932
        .TextFileStartRow = 1
        .TextFileParseType = xlDelimited
        .TextFileTextQualifier = xlTextQualifierDoubleQuote
        .TextFileConsecutiveDelimiter = False
        .TextFileTabDelimiter = True
        .TextFileSemicolonDelimiter = False
        .TextFileCommaDelimiter = False
        .TextFileSpaceDelimiter = False
        .TextFileColumnDataTypes = Array(1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1)
        .TextFileTrailingMinusNumbers = True
        .Refresh BackgroundQuery:=False
    End With
    
    ActiveSheet.Range(strTitle).Value = Mid(vntFileName, InStrRev(vntFileName, "\") + 1)
    
    ThisWorkbook.Save
End Sub