I've got charges, but have no running instances

Hello.

You can find active resources by following the steps "Confirm you have terminated all active resources" in the document below.
Please follow these steps to search for resources that incur charges.
https://repost.aws/knowledge-center/check-for-active-resources

For EC2, you will also be charged for snapshots and EBS volumes.
Therefore, please check whether there are any remaining EBS volumes or snapshots.