can someone help on how i can use the Manager app to prepare financials for a manufacturing company
Please be more specific about where you need assistance.
If you are a new user, I recommend familiarizing yourself with the available guides, particularly those related to inventory management and production. When you encounter a specific issue, please search the forum first to see whether it has already been addressed. If not, feel free to create a new post.
Link to guides: Guides | Manager.io
You might also like accountingcoach.com where you will find information on accounting in general