how can i make a subproject under the main project

QuickBooks Online (QBO) does not directly support the creation of sub-projects under the main project, @Ahmed11_2. However, there are workarounds to achieve this.

In QBO, the Projects feature has a flat structure, which allows you to assign multiple projects to a customer. However, it does not permit adding subprojects under a main project, but there are few workaround to achieve this.

First, if you're managing multiple jobs under one client or project, you can use sub-customers to present subprojects.

Here's how:

1. Go to Sales, then select Customer.
2. Click New Customer.
3. Fill in the details and check the box "Is a sub-customer"
4. Choose the parent customer (which could represent your main project).
5. Select Save.

Second, use a consistent naming convention for your projects. You can create separate projects and name them with a pattern like "MainProject_Subproject1". For instance, "OfficeBuilding_Foundation" and "OfficeBuilding_Electrical".

If you have additional questions, feel free to leave a comment.