how to add TABS on product page?

Hello.
Can you please describe – what tabs do you mean? You can try to use default template, go to admin area -> Ready! Options -> Templates and deactivate selected template – then check your product view page.
About cart info – you can use Shopping cart widget in your header.

Regards,
Alexey.

I like WP Post Tabs for tabs on the product page.

Hello.
Can you provide me with screenshot of how it should look in final result? As I doesn’t understand – what WP post tabs do you mean.

Regards,
Alexey.

Sure — at least this is what I think the original poster wanted:
https://www.cobblestone-press.org/product/fivealarmneighbor/

On the test listing above — Book Details, Excerpt, and More Books are all on tabs that my customer will be able to navigate through.

I use a plug in for it: https://www.ads-software.com/plugins/wordpress-post-tabs/