diff --git a/app/Console/Commands/CheckData.php b/app/Console/Commands/CheckData.php
index 9edd42f4dfba..94a1c6e105ec 100644
--- a/app/Console/Commands/CheckData.php
+++ b/app/Console/Commands/CheckData.php
@@ -890,6 +890,40 @@ class CheckData extends Command
 
                 $this->logMessage("Fixing country for # {$client->id}");
             });
+
+            Client::query()->whereNull("settings->currency_id")->cursor()->each(function ($client){
+                $settings = $client->settings;
+                $settings->currency_id = (string)$client->company->settings->currency_id;
+                $client->settings = $settings;
+                $client->saveQuietly();
+
+                $this->logMessage("Fixing currency_id for # {$client->id}");
+
+            });
+
+            Payment::withTrashed()->where('exchange_rate', 0)->cursor()->each(function ($payment){
+                $payment->exchange_rate = 1;
+                $payment->saveQuietly();
+
+                $this->logMessage("Fixing exchange rate for # {$payment->id}");
+            });
+
+            Payment::withTrashed()
+            ->whereHas("client", function ($query) {
+                $query->whereColumn("settings->currency_id", "!=", "payments.currency_id");
+            })
+            ->cursor()
+            ->each(function ($p) {
+                $p->currency_id = $p->client->settings->currency_id;
+                $p->saveQuietly();
+
+                
+            $this->logMessage("Fixing currency for # {$p->id}");
+
+            });
+
+
+
         }
     }
 
diff --git a/app/DataMapper/Tax/BaseRule.php b/app/DataMapper/Tax/BaseRule.php
index 41f9abd86799..ccc0d46a4449 100644
--- a/app/DataMapper/Tax/BaseRule.php
+++ b/app/DataMapper/Tax/BaseRule.php
@@ -319,6 +319,7 @@ class BaseRule implements RuleInterface
                 Product::PRODUCT_TYPE_EXEMPT => $this->taxExempt($item),
                 Product::PRODUCT_TYPE_REDUCED_TAX => $this->taxReduced($item),
                 Product::PRODUCT_TYPE_OVERRIDE_TAX => $this->override($item),
+                Product::PRODUCT_TYPE_ZERO_RATED => $this->zeroRated($item),
                 default => $this->defaultForeign(),
             };
 
@@ -327,6 +328,14 @@ class BaseRule implements RuleInterface
 
     }
 
+    public function zeroRated($item): self
+    {
+        $this->tax_rate1 = 0;
+        $this->tax_name1 = ctrans('texts.zero_rated');
+
+        return $this;
+    }
+
     public function taxByType(mixed $type): self
     {
         return $this;
diff --git a/app/DataMapper/Tax/DE/Rule.php b/app/DataMapper/Tax/DE/Rule.php
index d1a6a9e12458..1c251a6713a4 100644
--- a/app/DataMapper/Tax/DE/Rule.php
+++ b/app/DataMapper/Tax/DE/Rule.php
@@ -11,6 +11,7 @@
 
 namespace App\DataMapper\Tax\DE;
 
+use App\DataMapper\InvoiceItem;
 use App\DataMapper\Tax\BaseRule;
 use App\DataMapper\Tax\RuleInterface;
 use App\Models\Product;
@@ -63,7 +64,7 @@ class Rule extends BaseRule implements RuleInterface
     public function taxByType($item): self
     {
 
-        if ($this->client->is_tax_exempt || !property_exists($item, 'tax_id')) {
+        if ($this->client->is_tax_exempt || !property_exists($item, 'tax_id') || (isset($item->type_id) && $item->type_id == '5')) {
             return $this->taxExempt($item);
         }
 
diff --git a/app/Http/Controllers/QuoteController.php b/app/Http/Controllers/QuoteController.php
index ce4a08280afd..b2af3a1b560e 100644
--- a/app/Http/Controllers/QuoteController.php
+++ b/app/Http/Controllers/QuoteController.php
@@ -399,8 +399,7 @@ class QuoteController extends BaseController
 
         $quote->service()
               ->triggeredActions($request);
-        //   ->deletePdf();
-
+        
         event(new QuoteWasUpdated($quote, $quote->company, Ninja::eventVars(auth()->user() ? auth()->user()->id : null)));
 
         return $this->itemResponse($quote);
diff --git a/app/Jobs/Mail/NinjaMailerJob.php b/app/Jobs/Mail/NinjaMailerJob.php
index 49f4f0b28bd5..b51264af116e 100644
--- a/app/Jobs/Mail/NinjaMailerJob.php
+++ b/app/Jobs/Mail/NinjaMailerJob.php
@@ -51,10 +51,6 @@ class NinjaMailerJob implements ShouldQueue
 
     public $deleteWhenMissingModels = true;
 
-    public $nmo;
-
-    public $override;
-
     /** @var null|\App\Models\Company $company  **/
     public ?Company $company;
 
@@ -67,11 +63,8 @@ class NinjaMailerJob implements ShouldQueue
     protected $client_mailgun_domain = false;
 
 
-    public function __construct(NinjaMailerObject $nmo, bool $override = false)
+    public function __construct(public ?NinjaMailerObject $nmo, public bool $override = false)
     {
-        $this->nmo = $nmo;
-
-        $this->override = $override;
     }
 
     public function backoff()
@@ -106,7 +99,10 @@ class NinjaMailerJob implements ShouldQueue
             }
 
             $this->nmo->mailable->replyTo($this->nmo->settings->reply_to_email, $reply_to_name);
-        } else {
+        }elseif(isset($this->nmo->invitation->user)){
+            $this->nmo->mailable->replyTo($this->nmo->invitation->user->email, $this->nmo->invitation->user->present()->name());
+        } 
+        else {
             $this->nmo->mailable->replyTo($this->company->owner()->email, $this->company->owner()->present()->name());
         }
 
diff --git a/app/Jobs/Mail/NinjaMailerObject.php b/app/Jobs/Mail/NinjaMailerObject.php
index df33c35c2a11..f2cf0f646111 100644
--- a/app/Jobs/Mail/NinjaMailerObject.php
+++ b/app/Jobs/Mail/NinjaMailerObject.php
@@ -16,6 +16,8 @@ namespace App\Jobs\Mail;
  */
 class NinjaMailerObject
 {
+    
+    /* @var Illuminate\Mail\Mailable */
     public $mailable;
 
     /* @var Company $company */
@@ -32,7 +34,7 @@ class NinjaMailerObject
     /* Variable for cascading notifications */
     public $entity_string = false;
 
-    /* @var bool | App\Models\InvoiceInvitation | App\Models\QuoteInvitation | App\Models\CreditInvitation | App\Models\RecurringInvoiceInvitation | App\Models\PurchaseOrderInvitation $invitation*/
+    /* @var App\Models\InvoiceInvitation | App\Models\QuoteInvitation | App\Models\CreditInvitation | App\Models\RecurringInvoiceInvitation | App\Models\PurchaseOrderInvitation | \bool $invitation*/
     public $invitation = false;
 
     public $template = false;
diff --git a/app/Jobs/Product/UpdateOrCreateProduct.php b/app/Jobs/Product/UpdateOrCreateProduct.php
index 553944715b3a..702e8c33c0f4 100644
--- a/app/Jobs/Product/UpdateOrCreateProduct.php
+++ b/app/Jobs/Product/UpdateOrCreateProduct.php
@@ -69,8 +69,11 @@ class UpdateOrCreateProduct implements ShouldQueue
          * we do NOT update the product details this short block we
          * check for the presence of a task_id and/or expense_id
          */
-        $expense_count = count(array_column((array) $this->products, 'expense_id'));
-        $task_count = count(array_column((array) $this->products, 'task_id'));
+        // $expense_count = count(array_column((array) $this->products, 'expense_id'));
+        // $task_count = count(array_column((array) $this->products, 'task_id'));
+
+        $task_count = implode("", array_column((array) $this->products, 'task_id'));
+        $expense_count = implode("", array_column((array) $this->products, 'expense_id'));
 
         if ($task_count >= 1 || $expense_count >= 1) {
             return;
diff --git a/app/Models/Quote.php b/app/Models/Quote.php
index 07a59c8b97cd..3cf8a071ac23 100644
--- a/app/Models/Quote.php
+++ b/app/Models/Quote.php
@@ -44,7 +44,7 @@ use Laracasts\Presenter\PresentableTrait;
  * @property string|null $po_number
  * @property string|null $date
  * @property string|null $last_sent_date
- * @property string|null $due_date
+ * @property string|null|Carbon $due_date
  * @property string|null $next_send_date
  * @property bool $is_deleted
  * @property object|null $line_items
@@ -164,7 +164,7 @@ class Quote extends BaseModel
 
     protected $casts = [
         // 'date' => 'date:Y-m-d',
-        // 'due_date' => 'date:Y-m-d',
+        'due_date' => 'date:Y-m-d',
         // 'partial_due_date' => 'date:Y-m-d',
         'line_items' => 'object',
         'backup' => 'object',
@@ -197,7 +197,7 @@ class Quote extends BaseModel
 
     public function getDueDateAttribute($value)
     {
-        return $this->dateMutator($value);
+        return $value ? $this->dateMutator($value) : null;
     }
 
     public function getPartialDueDateAttribute($value)
diff --git a/app/PaymentDrivers/PayPalPPCPPaymentDriver.php b/app/PaymentDrivers/PayPalPPCPPaymentDriver.php
index 510a66b10db7..fd9a5c1cf2f7 100644
--- a/app/PaymentDrivers/PayPalPPCPPaymentDriver.php
+++ b/app/PaymentDrivers/PayPalPPCPPaymentDriver.php
@@ -437,7 +437,7 @@ class PayPalPPCPPaymentDriver extends BaseDriver
 
 
         if($shipping = $this->getShippingAddress()) {
-            $order['purchase_units'][0] = $shipping;
+            $order['purchase_units'][0]["shipping"] = $shipping;
         }
 
         $r = $this->gatewayRequest('/v2/checkout/orders', 'post', $order);
@@ -465,8 +465,7 @@ class PayPalPPCPPaymentDriver extends BaseDriver
     {
         return $this->company_gateway->require_shipping_address ?
         [
-            "shipping" =>  [
-                "address" =>
+            "address" =>
                 [
                     "address_line_1" => $this->client->shipping_address1,
                     "address_line_2" => $this->client->shipping_address2,
@@ -475,8 +474,8 @@ class PayPalPPCPPaymentDriver extends BaseDriver
                     "postal_code" => $this->client->shipping_postal_code,
                     "country_code" => $this->client->present()->shipping_country_code(),
                 ],
-            ]
         ]
+        
         : null;
 
     }
diff --git a/app/Services/Email/EmailDefaults.php b/app/Services/Email/EmailDefaults.php
index c01d5380941c..6598bac40d9f 100644
--- a/app/Services/Email/EmailDefaults.php
+++ b/app/Services/Email/EmailDefaults.php
@@ -208,9 +208,22 @@ class EmailDefaults
      */
     private function setReplyTo(): self
     {
-        $reply_to_email = str_contains($this->email->email_object->settings->reply_to_email, "@") ? $this->email->email_object->settings->reply_to_email : $this->email->company->owner()->email;
+        $reply_to_email = $this->email->company->owner()->email;
+        $reply_to_name = $this->email->company->owner()->present()->name();
 
-        $reply_to_name = strlen($this->email->email_object->settings->reply_to_name) > 3 ? $this->email->email_object->settings->reply_to_name : $this->email->company->owner()->present()->name();
+        if(str_contains($this->email->email_object->settings->reply_to_email, "@")){
+            $reply_to_email = $this->email->email_object->settings->reply_to_email; 
+        }
+        elseif(isset($this->email->email_object->invitation->user)) {
+            $reply_to_email = $this->email->email_object->invitation->user->email;
+        }
+        
+        if(strlen($this->email->email_object->settings->reply_to_name) > 3) {
+             $reply_to_name =$this->email->email_object->settings->reply_to_name;
+        }
+        elseif(isset($this->email->email_object->invitation->user)) {
+            $reply_to_name = $this->email->email_object->invitation->user->present()->name();
+        }
 
         $this->email->email_object->reply_to = array_merge($this->email->email_object->reply_to, [new Address($reply_to_email, $reply_to_name)]);
 
diff --git a/app/Services/Quote/MarkSent.php b/app/Services/Quote/MarkSent.php
index 7c9c441ed4ec..f8d1c76d6ba7 100644
--- a/app/Services/Quote/MarkSent.php
+++ b/app/Services/Quote/MarkSent.php
@@ -42,7 +42,6 @@ class MarkSent
              ->service()
              ->setStatus(Quote::STATUS_SENT)
              ->applyNumber()
-            //  ->deletePdf()
              ->save();
 
         event(new QuoteWasMarkedSent($this->quote, $this->quote->company, Ninja::eventVars(auth()->user() ? auth()->user()->id : null)));
diff --git a/database/migrations/2024_01_09_084515_product_cost_field_population.php b/database/migrations/2024_01_09_084515_product_cost_field_population.php
index fd3ab9a43258..c38dd91d256a 100644
--- a/database/migrations/2024_01_09_084515_product_cost_field_population.php
+++ b/database/migrations/2024_01_09_084515_product_cost_field_population.php
@@ -28,20 +28,22 @@ return new class extends Migration
                 
                 $line_items = $invoice->line_items;
 
-                foreach ($line_items as $key => $item)
+                if(is_array($line_items))
                 {
-
-                    if($product = Product::where('company_id', $invoice->company_id)->where('product_key', $item->product_key)->where('cost', '>', 0)->first())
+                    foreach ($line_items as $key => $item)
                     {
-                        if((property_exists($item, 'product_cost') && $item->product_cost == 0) || !property_exists($item, 'product_cost'))
-                            $line_items[$key]->product_cost = (float)$product->cost;
+
+                        if($product = Product::where('company_id', $invoice->company_id)->where('product_key', $item->product_key)->where('cost', '>', 0)->first())
+                        {
+                            if((property_exists($item, 'product_cost') && $item->product_cost == 0) || !property_exists($item, 'product_cost'))
+                                $line_items[$key]->product_cost = (float)$product->cost;
+                        }
+                        
                     }
-                    
+
+                    $invoice->line_items = $line_items;
+                    $invoice->saveQuietly();
                 }
-
-                $invoice->line_items = $line_items;
-                $invoice->saveQuietly();
-
             });
     }