If you have selected the offline payment method, you will be redirected to the invoice page. Please take the following steps to convert to online payment:

1- Verify your email: If you have not already done, please click on the link that has been provided to you via email for email verification. If you have already verified your email then skip to step 2.
2- Log in to your account using your username and password. After you  log in you will see the following message:

It seems that you have an uncleared invoice in our database - If something went wrong along the way, you can go to the checkout page once again to try again: Go to the checkout page again, you may also cancel the payment (you will have the possibility to go to the Plan Selection screen once again): cancel.

3- Click on the "cancel" link.
4- Click on "Plan Selection"
5- Find the correct option based on your status and click on "Checkout with PayPal".
6- In "Membership Details" page Click on "Continue"
7- In "Checkout" page Click on "Continue". This will take you to PayPal to pay your membership fee. After you have completed your payment, you will be redirected to IAMA.org. You are done.