Invoice generation override?

Hi Dear,

is it possible to override file that generates invoice? Which file is? 

(I'd like to add a complex calculation to show a custom value in invoice, different from all those already present)

Very thanks

Hello

Yes. It is possible. In latest version, the method is generateInvoicePDF in components/com_osmembership/helper/helper.php but it of course, will require programming skill to implement the customization and make it as override

Tuan