I did like @codeulike said above:
Delete the rejected IAP and try again with a new one (and hence a different product id)
Make sure you get the IAP to 'Ready to Submit' status but DONT submit it.
Go to your App Version tab and scroll down, you will see an 'In App Purchases' section with a + button that ONLY APPEARS when you have IAPS of status 'Ready to Submit'.
Click on the + button then add your IAPs
danielreissl
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I did like @codeulike said above:
"delete the rejected IAP and try again with a new one (and hence a different product id)"
"Make sure you get the IAP to 'Ready to Submit' status but DONT submit it.
Instead go to your App Version tab and scroll down, you will see an 'In App Purchases' section with a + button that ONLY APPEARS when you have IAPS of status 'Ready to Submit'."