CIGIN1 Tax calculator by percentage of VAT or GST (by country). You need to enter the total amount and tax percentage for net receivables. This usually happens when we fill out an invoice and we only know the total amount you are going to charge a customer. Works for any country. If you have any questions, please contact us at [email protected] and we will answer and if possible we will update this app with your contributions. The code for this application is CIGIN1.