Billing module modify invoice and proforma number
A few question about the billing module...
1. What got to do if i've done some error on invoice generation and got to modify the invoice number? May i change the number only from phpmyadmin in the appropriate table? If i'll modify from there, the systema automaticcaly coninute the correct invice number generation?
2. If i've to delete an invoice or a proforma invoice, i've go to delete the entry from phpmyadmin only?
3. The pdf of invoice or proforma invoice, are generated any time i'll try to retrive the pdf, or they are stored somewhere?