diff --git a/src/Danfse/DanfseTemplate.php b/src/Danfse/DanfseTemplate.php
index d3f49bd..b9e42e6 100644
--- a/src/Danfse/DanfseTemplate.php
+++ b/src/Danfse/DanfseTemplate.php
@@ -150,7 +150,13 @@ public function buildData(array $nfse): array
 
             'servico' => [
                 'codigo_trib_nacional'  => $this->formatter->codTribNacional($this->val($cServ, 'cTribNac')),
-                'desc_trib_nacional'    => $this->formatter->limit(trim($this->val($infNfse, 'xTribNac')), 60),
+                // NT008 2.4.5 prefers an authorized municipal description
+                // over the national one. The length is suggested, not a new
+                // tax-code validation or data mutation.
+                'desc_trib_nacional'    => $this->formatter->limit(
+                    $this->val($infNfse, 'xTribMun') ?: $this->val($infNfse, 'xTribNac'),
+                    167,
+                ),
                 'codigo_trib_municipal' => $this->val($cServ, 'cTribMun') ?: '-',
                 'codigo_nbs'           => $this->formattedNbs($this->val($cServ, 'cNBS')),
                 'desc_trib_municipal'   => $this->formatter->limit(trim($this->val($infNfse, 'xTribMun')), 60),
@@ -179,6 +185,11 @@ public function buildData(array $nfse): array
             ],
 
             'tributacao_federal' => [
+                // NT008 note 6: optional PIS/COFINS line is present only
+                // for actual issue competence through calendar year 2026.
+                'mostrar_linha_2026' => $this->showFederalDetailsForCompetence(
+                    $this->val($infDps, 'dCompet'),
+                ),
                 'irrf'   => $this->currencyOrDash($this->val($tribFed, 'vRetIRRF')),
                 'cp'     => $this->currencyOrDash($this->val($tribFed, 'vRetCP')),
                 'csll'   => $this->currencyOrDash($this->val($tribFed, 'vRetCSLL')),
@@ -417,6 +428,17 @@ private function purposeLabel(string $value): string
         };
     }
 
+    private function showFederalDetailsForCompetence(string $competence): bool
+    {
+        // Do not use today's date: printing an older authorized invoice
+        // must reproduce the display rules for its original competence.
+        if (preg_match('/^(\\d{4})-\\d{2}-\\d{2}$/D', $competence, $matches) !== 1) {
+            return false;
+        }
+
+        return (int) $matches[1] <= 2026;
+    }
+
     private function pisCofinsRetentionLabel(string $value): string
     {
         return match ($value) {
diff --git a/src/Danfse/HTMLTemplate.php b/src/Danfse/HTMLTemplate.php
index 266ef91..0383ad0 100644
--- a/src/Danfse/HTMLTemplate.php
+++ b/src/Danfse/HTMLTemplate.php
@@ -366,11 +366,13 @@
                 <td><span class="label">Contribuição Previdenciária - Retida</span><span class="value"><?= $data['tributacao_federal']['cp'] ?></span></td>
                 <td><span class="label">Contribuições Sociais - Retidas</span><span class="value"><?= $data['tributacao_federal']['csll'] ?></span></td>
             </tr>
-            <tr>
+            <?php if ($data['tributacao_federal']['mostrar_linha_2026']): ?>
+            <tr class="federal-competence-2026">
                 <td><span class="label">PIS - Débito Apuração Própria</span><span class="value"><?= $data['tributacao_federal']['pis'] ?></span></td>
                 <td><span class="label">COFINS - Débito Apuração Própria</span><span class="value"><?= $data['tributacao_federal']['cofins'] ?></span></td>
                 <td colspan="2"><span class="label">Tipo de retenção PIS/COFINS/CSLL</span><span class="value"><?= $data['tributacao_federal']['descricao_retencao'] ?></span></td>
             </tr>
+            <?php endif; ?>
         </table>
     </div>
 
diff --git a/tests/Unit/Danfse/DanfseGoldenReferenceTest.php b/tests/Unit/Danfse/DanfseGoldenReferenceTest.php
index bfabaac..2c485ab 100644
--- a/tests/Unit/Danfse/DanfseGoldenReferenceTest.php
+++ b/tests/Unit/Danfse/DanfseGoldenReferenceTest.php
@@ -104,7 +104,7 @@ public function testLongOfficialDescriptionsUseStableSixtyCharacterSummary(): vo
 
         $data = (new DanfseTemplate())->buildData($nfse);
 
-        self::assertSame(63, mb_strlen($data['servico']['desc_trib_nacional']));
+        self::assertSame(170, mb_strlen($data['servico']['desc_trib_nacional']));
         self::assertSame(63, mb_strlen($data['servico']['desc_trib_municipal']));
         self::assertStringEndsWith('...', $data['servico']['desc_trib_nacional']);
         self::assertStringEndsWith('...', $data['servico']['desc_trib_municipal']);
diff --git a/tests/Unit/Danfse/DanfseTemplateTest.php b/tests/Unit/Danfse/DanfseTemplateTest.php
index f0dfabe..d0666cc 100644
--- a/tests/Unit/Danfse/DanfseTemplateTest.php
+++ b/tests/Unit/Danfse/DanfseTemplateTest.php
@@ -135,6 +135,40 @@ public function testAuthorizedMunicipalTotalsUseNfseValuesNotDpsTaxFlags(): void
         self::assertSame('R$ 630,00', $data['tributacao_municipal']['issqn_apurado']);
     }
 
+    public function testMunicipalTaxDescriptionWinsButNationalIsFallback(): void
+    {
+        $nfse = $this->fixtureNfseData();
+        $nfse['infNFSe']['xTribNac'] = 'Descricao nacional sintetica';
+        $nfse['infNFSe']['xTribMun'] = 'Descricao municipal sintetica';
+
+        $template = new DanfseTemplate();
+        self::assertSame('Descricao municipal sintetica', $template->buildData($nfse)['servico']['desc_trib_nacional']);
+        self::assertStringContainsString('Descricao municipal sintetica', $template->render($nfse, new DanfseConfig()));
+        self::assertStringNotContainsString('Descricao nacional sintetica', $template->render($nfse, new DanfseConfig()));
+
+        unset($nfse['infNFSe']['xTribMun']);
+        self::assertSame('Descricao nacional sintetica', $template->buildData($nfse)['servico']['desc_trib_nacional']);
+    }
+
+    public function testFederalDetailRowFollowsOriginalFiscalCompetence(): void
+    {
+        $nfse = $this->fixtureNfseData();
+        $template = new DanfseTemplate();
+
+        $nfse['infNFSe']['DPS']['infDPS']['dCompet'] = '2026-12-31';
+        self::assertTrue($template->buildData($nfse)['tributacao_federal']['mostrar_linha_2026']);
+        self::assertStringContainsString('class="federal-competence-2026"', $template->render($nfse, new DanfseConfig()));
+
+        $nfse['infNFSe']['DPS']['infDPS']['dCompet'] = '2027-01-01';
+        self::assertFalse($template->buildData($nfse)['tributacao_federal']['mostrar_linha_2026']);
+        $html = $template->render($nfse, new DanfseConfig());
+        self::assertStringNotContainsString('class="federal-competence-2026"', $html);
+        self::assertStringContainsString('Contribuições Sociais - Retidas', $html);
+
+        unset($nfse['infNFSe']['DPS']['infDPS']['dCompet']);
+        self::assertFalse($template->buildData($nfse)['tributacao_federal']['mostrar_linha_2026']);
+    }
+
     public function testDescriptionPreservesNewlinesWithoutRenderingMarkup(): void
     {
         $nfse = $this->fixtureNfseData();