Add Storename+Address to Storefront Invoice Template

[hus2020]

Hi Guys,

I would like to tweak the storefront invoice template and email invoice template that my customers see. Actually the regulation in Malaysia is to have the name of the company and the address for tax filing purposes.

There are 3 changes I would like to do:
1) Add my store name, store address and store contact no in the same invoice template, just above the order id.
2) Change the header text 'Order Details' to 'Tax Invoice'
3) Do the same changes as no (1) inside the order confirmation email which is sent to customer.

The 2 screenshot below depicts what I want to achieve.