Custom PDF invoice Product table columns with individual TAX and currency

I am currently developing PDF invoice and want to add some columns "Tax", "Currency", "Product price without Tax".
I am able to make changes in PdfService.cs but i don't know how to set new columns in invoice.
Please can anyone guide me through some lines of code for achieving my purpose?

Thanks in advance.

No reply from team ?

Finally found the solution, I made changes in PDFservice.cs
created columns

cellProductItem = new PdfPCell(new Phrase(_localizationService.GetResource("PDFIncluding.Tax", lang.Id), titleFont));
               
                cellProductItem.Border = Rectangle.NO_BORDER;
                cellProductItem.HorizontalAlignment = Element.ALIGN_CENTER;
                productsTable.AddCell(cellProductItem);

and than

string unitPrice;


                    var unitPriceInclTaxInCustomerCurrency = _currencyService.ConvertCurrency(orderItem.UnitPriceInclTax, order.CurrencyRate);
                    unitPrice = _priceFormatter.FormatPrice(unitPriceInclTaxInCustomerCurrency, true, order.CustomerCurrencyCode, lang, true);


                    cellProductItem = new PdfPCell(new Phrase(unitPrice, font));
                    cellProductItem.HorizontalAlignment = Element.ALIGN_CENTER;
                    cellProductItem.Border = Rectangle.NO_BORDER;
                    productsTable.AddCell(cellProductItem);

So, this is best and easiest way to understand the structure of PDFservice.cs

Hope it will help someone.