How can I figure out what card I had my return sent to in 2018

To access your prior year tax returns sign onto the TurboTax website with the userID you used to create the account.

Scroll down to the bottom of the screen and on the section Your tax returns & documents click on Show. Click on the Year and Click on Download/print return (PDF)

To verify this information, please follow these steps to print or view your TurboTax Electronic Filing Instructions Page. The banking and withdrawal information can also be printed/viewed on your Federal Information Worksheet Part V, and the State Information Worksheet, Part VI.

You may also follow the instructions in the link:

How do I access a prior year return?