Facing issue with integrating html print format

Hi, i’m unable to find any documentation or tutorial on how to integrate it with main working module.
Kindly help, I’m new to ERPnext.

Can you please explain what you mean with “main working module”? What do you want to integrate?

We want to use it as our new quotation print format, But failing to integrate it.

I assume you had a look at the documentation.
Customize Print Format (erpnext.com)

Can you describe your problem more detailed?