You can amend your 2017 tax return and include the foreign bank account information. You will also need to file a FBAR. That is a report of foreign bank accounts and is not handled by TurboTax.. You will do that through the FBAR website or through this website: BSAE Filing.
You should file your FBAR as soon as possible and indicate that you are filing late because you didn’t know you were required to file by selecting that option in the drop down menu.
Here is how to amend your return.
Form 8938 - if above the filing threshold
Here is information on the FBAR.
[edited3/8/2021 | 4:48 pm PST]