diff --git a/Back/Data/Models/Invoice.cs b/Back/Data/Models/Invoice.cs
index 6ac6f46..76bcab7 100644
--- a/Back/Data/Models/Invoice.cs
+++ b/Back/Data/Models/Invoice.cs
@@ -29,10 +29,10 @@ namespace Back.Data.Models
         public int? inty { get { return pattern.BillType.inty; } }
         //الگوی صورتحساب
         [MaxLength(2)]
-        public int? inp { get { return pattern.inp; } }
+        public int? inp { get { return pattern?.inp; } }
         //شماره اقتصادی فروشنده
         [MaxLength(14)]
-        public string? tins { get { return company.EconomicCode; } }
+        public string? tins { get { return company?.EconomicCode; } }
         //شماره اقتصادی خریدار
         [MaxLength(14)]
         public string? tinb { get { return Customer.EconomicCode; } }
@@ -53,7 +53,7 @@ namespace Back.Data.Models
         public decimal? todam { get { return invoiceDetails.Sum(i => i.odam) + invoiceDetails.Sum(i => i.olam); } }
         //مجموع صورتحساب
         [MaxLength(18)]
-        public decimal? tbill { get {return pattern.inp==10? torv+ tvam+ todam : invoiceDetails.Sum(i => i.tsstam);}}
+        public decimal? tbill { get {return pattern?.inp==10? torv+ tvam+ todam : invoiceDetails.Sum(i => i.tsstam);}}
         //مجموع وزن خالص
         [MaxLength(18)]
         public decimal? tonw { get { return invoiceDetails.Sum(i => i.nw); } }
@@ -87,7 +87,7 @@ namespace Back.Data.Models
         public string? bpn { get { return Customer.PassportNumber; } }
         //کد شعبه فروشنده
         [MaxLength(9)]
-        public string? sbc { get { return company.BranchID; } }
+        public string? sbc { get { return company?.BranchID; } }
         //مبلغ پرداختی نقدی
         [MaxLength(18)]
         public decimal? cap { get { return insp - tvam - todam - tbill; } }
diff --git a/Shared/DTOs/InvoiceDtos.cs b/Shared/DTOs/InvoiceDtos.cs
new file mode 100644
index 0000000..c1ada47
--- /dev/null
+++ b/Shared/DTOs/InvoiceDtos.cs
@@ -0,0 +1,109 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Shared.DTOs
+{
+    public class InvoiceDTO
+    {
+        public int ID { get; set; }
+        public InvoiceType? invoiceType { get; set; }
+        public string? invoiceTypeTitle { get; set; }
+        public int? CompanyID { get; set; }
+        public int CustomerID { get; set; }
+        public int CustomerName { get; set; }
+        public string? Udate { get; set; }
+        public string? InvoicIssueDate { get; set; }
+        public string? InvoiceDate { get; set; }
+        public bool? PreparedtoSendtoTax { get; set; }
+        public string? Title { get; set; }
+        public string? Des { get; set; }
+        //مجموع تخفیفات
+        public decimal? tdis { get; set; }
+        //مجموع مالیات بر ارزش افزوده
+        [MaxLength(18)]
+        public decimal? tvam { get; set; }
+        //مجموع صورتحساب
+        [MaxLength(18)]
+        public decimal? tbill { get; set; }
+        public int? BillReference { get; set; }
+        public ICollection<InvoiceItemDTO> items { get; set; }
+        public ICollection<InvoicePaymentDTO> payments { get; set; }
+       // public ICollection<InvoiceStatusDto> Invoicestatuschanges { get; set; }
+       // public ICollection<InvoiceSendTaxDTO> InvoiceSendTaxs { get; set; }
+
+    }
+    public class InvoiceItemDTO
+    {
+        public int? ID { get; set; }
+        public int CODID { get; set; }
+        // شرح کاال/خدمت
+        public string? sstt { get; set; }
+        //واحد اندازهگیری
+        public string? mu { get; set; }
+        //تعداد/مقدار
+        public decimal am { get; set; }
+        //مبلغ واحد
+        public decimal fee { get; set; }
+        //نرخ مالیات بر ازش افزوده
+        public decimal? vra { get; set; }
+        //مبلغ مالیات بر ارزش افزوده
+        public decimal? vam { get; set; }
+        //مبلغ تخفیف
+        public decimal? dis { get; set; }
+        //مبلغ بعد از تخفیف
+        public decimal? adis { get; set; }
+        //مبلغ کل کالا/خدمت
+        public decimal? tsstam { get; set; }
+    }
+    public class InvoicePaymentDTO
+    {
+        public int? ID { get; set; }
+        [MaxLength(9)]
+        public string? iinn { get; set; }
+        //شماره پذیرنده فروشگاهی
+        [MaxLength(14)]
+        public string? acn { get; set; }
+        //شماره پایانه
+        [MaxLength(8)]
+        public string? trmn { get; set; }
+        //روش پرداخت
+        [MaxLength(2)]
+        public int? pmt { get; set; }
+        //شماره پیگیری/شماره مرجع
+        [MaxLength(14)]
+        public string? trn { get; set; }
+        //شماره کارت پرداخت کننده صورتحساب
+        [MaxLength(16)]
+        public string? pcn { get; set; }
+        //شماره/شناسه ملی/کد فراگیر اتباع غیر ایرانی پرداخت کننده صورتحساب
+        [MaxLength(12)]
+        public string? pid { get; set; }
+        //تاریخ و زمان پرداخت
+        [MaxLength(13)]
+        public long? pdt { get; set; }
+        //مبلغ پرداختی
+        [MaxLength(18)]
+        public decimal? pv { get; set; }
+
+    }
+    //------------------------------
+    public class InvoiceStatusDto
+    {
+        public string Date { get; set; }
+        public string User { get; set; }
+        public string FromStatus { get; set; }
+        public string ToStatus { get; set; }
+    }
+    public class InvoiceSendTaxDTO
+    {
+        public int SendTaxID { get; set; }
+        public string Date { get; set; }
+        public string Status { get; set; }
+        public string Type { get; set; }
+    }
+}
+