defaults input to today's date but only if there aren't any dates provided.

Models/TaxRecord/TaxRecordInput.cs

@@ -4,7 +4,7 @@
     {
         public int Id { get; set; }
         public int VehicleId { get; set; }
-        public string Date { get; set; }
+        public string Date { get; set; } = DateTime.Now.ToShortDateString();
         public string Description { get; set; }
         public decimal Cost { get; set; }
         public string Notes { get; set; }