I'm here to give details on why you get a Tax ID invalid when trying to submit your 1099's in QuickBooks Online (QBO).
Let's ensure you're using the SSN on your Tax IDs on your contractor's information instead of an EIN. If you have reviewed your 1099 filling form and your issue persists, I recommend contacting our support team. In this way, the error you're currently experiencing will be further investigated and will be properly addressed with the right solution.