Before you go, please make sure that WooCommerce is installed.
Your user need to add more characters to their account, you need to provide a TTS product for them to buy.
- Create a new product at WP Admin Dashboard > Product > Add New.
- Give it a name and create a new category called "tts".
- Fill the TTS Product information, the box will be below post editor area:
- Publish the product and it will appear on My Account page.