To generate an invoice for a particular student can be done in 3 simple steps.
1. After you must have been logged into your schoolable account, click on setup and then click on students as highlighted in the image below.
Use the search bar to find the student you wish to generate an invoice for.

2. When you have seen the student you want to generate an invoice for, click the 3 dots right beside the date. 3 options would come up, to view, edit, delete. Click on view as highlighted in the image below. 

3. Click the generate invoice button, select what term you are generating the invoice for, click the replace existing invoice if you had initially created an invoice for the student but want to replace that invoice with this and click the generate invoice button.