public static void Clear(this NotTaxTimDbContext db)
 {
     db.TaxCalculationTypes.Clear();
     db.PostalCodes.Clear();
     db.CalculationRuleTypes.Clear();
     db.CalculationResults.Clear();
     db.SaveChanges();
 }
 public CalculationsCreateHandler(NotTaxTimDbContext dbContext)
 {
     _dbContext = dbContext;
 }