Hello,
Azure for students comes with 100$ credits. So, please ensure you've chosen the right one when deploying any resource.
Please find the following link to understand about Azure for students free services list for your reference: https://azure.microsoft.com/en-in/free/students/
You can deploy 2 B1S VMs (one Windows, one Linux) and run it for 750 hours for free of cost. This might be 24 hours a day up to 750 hours or the total 750 free hours spread across 12 months period time (by turning it on only when used) is up to your choice. Below is the eligible VM size for student credit subscription.
When creating the free VMs you have to ensure you choose the image size and OS disc size that meets the free criteria as mentioned below.
You will start seeing charges when any one of the below scenario occurs:
- Exhausted 750 free hours of free usage.
- Instance image size and OS disc size does not meet the above free criteria.
With regards to the incurred charges you can reach out to Azure Billing support team by following the steps shared in this document section: [https://learn.microsoft.com/en-us/azure/azure-portal/supportability/how-to-create-azure-support-request#go-to-help--support-from-the-global-header
Regards,
Divya.