How to add GST number in Sales Invoice print format?

Hi everyone,

I would like to include the GST number on my Sales Invoice when it is sent to print. I’m not sure where or how to add it so that it automatically appears in the printed invoice (for example, under the company or customer details).

Can someone guide me on how to achieve this? Should I modify the print format, or is there a field I can directly use in the doctype?

Thanks in advance!

GSTIN is entered at the address level, so if you enter it in the master in the specific address for a customer / supplier it should appear in the invoice under the address.