Complete features and fix bugs for a web project

I have a webapp (checkref.co) which has been developed up to about 75%. Some features need to completed and some of UI updated and bugs. Below is a high level of the expectation;

Tech Stack:
Backend - Nodejs
Frontend - Reactjs/Material UI/
DB - MongoDB
Hosting - DigitalOcean Droplets
Email - ElasticEmail
Storage - AWS S3
SMS - Africa Is Talking

1. Review and update UI changes
2. Complete development of uncompleted features
3. Modification to existing features
4. Fix list of bugs

Full requirement details can be found at the link below;
https://maple-cornet-978.notion.site/New-Developer-to-do-list-e16cfcb91a704711a34b3fdd03388938