How can I change the invoice due date (remove 30 days and put upon receipt)? can I change the template?

Edit the invoice and change the terms and QBO should automatically change the due date for that invoice.  

SALES --  INVOICES -- edit the invoice in question - don't forget to save

The second question was 'can i change the template?'

Hey there, Kicoma Contracting.

Thanks for reaching out to the Community for support. QuickBooks provides the option to customize your sales forms. Here's an article that will provide more information as well as steps on how to proceed. 

If you have any other questions, feel free to reach back out.

You don't change the template, you change the Terms for that Customer.  The template will pull whatever terms you have set up for that customer (different customers can have different terms).  Go to the customer and change their terms - all new invoices will then pull the new terms (you will have to manually edit previous invoices).