about charge after 12 mo free trial

1. Go to Cost Explorer -> Choose Date Range in right pane
2. Granularity -> Daily
3. Dimension -> Service
4. Service -> Leave it blank

This would show you when and what are the services which are getting billed/would be billed. You can also check the usage/cost in AWS Billing

I'd suggest you to go through this re:Post Knowledge center Article, which explains how to delete resources which are no longer required. Last resort is NUKE but use it with caution and be double sure before running.

I'd start with basic services, such as EC2, S3, KMS, ECS, Lambda.

If you want to setup alert, you can consider setting up AWS budgets and configure alarm on those, which would notify you, if you cross the defined usage threshold. Follow the Well Architected Lab instructions here for setting up budget alert based on your usage.

Hope you find this helpful.

Comment here if you have additional questions, happy to help.

Abhishek

Scroll down to the foot of the right hand pane of https://console.aws.amazon.com/billing/home#/bills and it will show you everything that you're running in the current month that is billable, even though the total may be zero if you are still in free tier.

Expand each section and drill down to see which region(s) you are using resources in.

AWS Cost Management can also give you a view on this https://console.aws.amazon.com/cost-management/home#/dashboard

Detailed advice on terminating resources you don't need any more is here https://repost.aws/knowledge-center/terminate-resources-account-closure

A drastic option if you want to terminate all running resources is AWS Nuke (caution: use with care!) https://docs.aws.amazon.com/prescriptive-guidance/latest/patterns/automate-deletion-of-aws-resources-by-using-aws-nuke.html