or="invoiceNumberFormat">Invoice Number Format</label>
                                    <select id="invoiceNumberFormat" name="invoiceNumberFormat" class="form-control" onchange="updateFormatPreview()">
                                        <option value="{prefix}{year}{month}{sequence:4}" {{if eq .settings.InvoiceNumberFormat "{prefix}{year}{month}{sequence:4}"}}selected{{end}}>
                                            Prefix + Year + Month + Sequence (INV-202512-0001)
                             