I can provide some information about adding new categories in QuickBooks Self-Employed (QBSE), @moh-gaafar88.

The categories we have in QuickBooks Self-Employed are in line with the Schedule C categories the IRS has for self-employed individuals. The feature to create a new category isn't available yet.

However, our Product Development team is now working on how to approach dynamic categories while maintaining their main use as tax categories for self-employed individuals.

For now, you can visit the QuickBooks Blog to check for new updates and features that we have. 

See this article for more information about schedule C and expense categories in QuickBooks Self-Employed. 

Here's a detailed guidance on how to manually add transactions in QuickBooks Self-Employed and on how to categorize transactions in QuickBooks Self-Employed.

Let me know if you still have questions about the categories that we have in QBSE and or anything else by leaving a reply below. Take care and have a wonderful day!