Why do I keep getting "You have exceeded the allowed number of AWS accounts." error even though I've only added 2 accounts to the organization so far?

Question

When I try to add a new account to my Organization using either the Web UI or the AWS cli, I keep getting this error. I checked the quotas and I should be able to create 10 accounts. But however as of now I only have 2 accounts. It's the managing account and another account. 
This is the error I get when trying to use the AWS cli for this,

```
An error occurred (ConstraintViolationException) when calling the CreateAccount operation: You have exceeded the allowed number of AWS accounts.
```
I tried searching for a solution everywhere but it says to contact AWS technical support. But the problem is since I'm on **Basic** support tier, technical support isn't available for me and currently I'm not capable to afford the **Developer** support tier. I wouldn't be able to purchase it until my request for Startup credits with my startup enabling program is accepted. Even then I'm not sure if I could use those credits towards a support plan. So I'll appreciate any help.

Answer

As per [Quotas for AWS Organizations](https://docs.aws.amazon.com/organizations/latest/userguide/orgs_reference_limits.html), while the default quota limit is 10

```
Newly created accounts and organizations may experience a quota below the default of 10 accounts.
```
You can request increases by using the [Service Quotas console](https://console.aws.amazon.com/servicequotas/home?region=us-east-1#!/services/organizations/quotas), going to   [Default maximum number of accounts](https://us-east-1.console.aws.amazon.com/servicequotas/home/services/organizations/quotas/L-29A0C5DF), and click `Request increase at account level`. This will create necessary [support case](https://support.console.aws.amazon.com/support/home?region=us-east-1#/case/history)

Why do I keep getting "You have exceeded the allowed number of AWS accounts." error even though I've only added 2 accounts to the organization so far?

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