Not sure why you would want to use the Online version but no, the ID or serial number will not work for the Online version. You would need to contact TurboTax support, they might be able to give you a credit to use the Online version.
The Online version you can prepare one return (Federal & State) per account (UserID). If you need to prepare another return you would need to create a new account. The Online version also does not have Forms mode.
To contact TurboTax support:
https://ttlc.intuit.com/replies/3300041Not sure why you would want to use the Online version but no, the ID or serial number will not work for the Online version. You would need to contact TurboTax support, they might be able to give you a credit to use the Online version.
The Online version you can prepare one return (Federal & State) per account (UserID). If you need to prepare another return you would need to create a new account. The Online version also does not have Forms mode.
To contact TurboTax support:
https://ttlc.intuit.com/replies/3300041I prefer the online version since it does not require a software install. Additionally, the online version has my previous years information.
Oh, contact support they can you get the Online version without paying again.