Created or Edited -> User input of Item Details.Tax -> ItemDetails_Tax_Validations

if(row.Rate != null && row.Qty != null && row.Tax != null)
{
	get_tax_value = GST_Details[ID == row.Tax].Total_Rate;
	Tax_calc = ifnull(row.Qty,0.0) * ifnull(row.Rate,0.0) * ifnull(get_tax_value,0.0) / 100;
	amount_calc = row.Qty * row.Rate;
	row.Sub_Total=ifnull(amount_calc,0.00);
	row.Tax_Value=Tax_calc;
	row.Total_Amount=ifnull(amount_calc,0.0) + ifnull(Tax_calc,0.0);
	tot = 0.0;
	for each  rec in Item_Details
	{
		tot = tot + ifnull(rec.Total_Amount,0.0);
	}
	input.Item_Total = tot;
	input.Overall_Total = ifnull(input.Item_Total,0.0) + ifnull(input.Extra_Charge_s_Total,0.0);
	// 	// new fields caluclation - 1/4/2023 - stats
	// 	input.Gross_Total = ifnull(input.Gross_Total,0.0) + ifnull(row.Sub_Total,0.0)+ifnull(input.Tax_Total,0.0);
	// 	input.Tax_Total = ifnull(input.Tax_Total,0.0)+ifnull(row.Tax_Value,0.0);
	// 	// new fields calculation ends
}
if(row.Tax == null)
{
	row.Tax_Value=0.0;
	row.Total_Amount=ifnull(row.Qty,0.0) * ifnull(row.Rate,0.0);
	tot1 = 0.0;
	for each  rec in Item_Details
	{
		tot1 = tot1 + rec.Total_Amount;
	}
	input.Item_Total = tot1;
	input.Overall_Total = ifnull(input.Item_Total,0.0) + ifnull(input.Extra_Charge_s_Total,0.0);
}