Store previously created invoices despite changes in calculation
Hey, the topic might not reveal clearly the point, but the thing is:
- For a recent 2 years I was not registered as a VAT (value added tax) payer, so in the VAT column, in every invoice it displayed "not a VAT payer".
- Now I registered as a VAT payer and want VAT code to be included instead of "not a VAT payer", but not affect older invoices that are stored in the database.
My thinking of the solution is like this - add another table or record that stores date of me becoming VAT payer, and
1) before the date it would display "not a VAT payer" and not count VAT tax
2) and after that date it would display VAT code and calculate VAT at the end of the invoice.
But how would I do that?