public function tagCOFINSST($nItem = '', $vBC = '', $pCOFINS = '', $qBCProd = '', $vAliqProd = '', $vCOFINS = '')
{
$cofinsst = $this->dom->createElement("COFINSST");
$this->dom->addChild($cofinsst, "vBC", $vBC, true, "[item {$nItem}] Valor da Base de Cálculo da COFINS");
$this->dom->addChild($cofinsst, "pCOFINS", $pCOFINS, true, "[item {$nItem}] Alíquota da COFINS (em percentual)");
$this->dom->addChild($cofinsst, "qBCProd", $qBCProd, false, "[item {$nItem}] Quantidade Vendida");
$this->dom->addChild($cofinsst, "vAliqProd", $vAliqProd, false, "[item {$nItem}] Alíquota da COFINS (em reais)");
$this->dom->addChild($cofinsst, "vCOFINS", $vCOFINS, true, "[item {$nItem}] Valor da COFINS");
$this->aCOFINSST[$nItem] = $cofinsst;
return $cofinsst;
}