I need the last four numbers of the card I used to pay the IRS.

[MollsBBU · Accepted solution]

You may locate this account information by reviewing your forms and worksheets. 

If you have filed:

1. Sign in to TurboTax Online
2. On the white bar at the top, from the My TurboTax drop-down menu, select My Tax Timeline.
3. At the bottom of the 2016 year, there is a SOME THINGS YOU CAN DO section
   please see screenshot "Some things you can do" below for an example
4. Select Download all forms and worksheets
5. Next, select I need it for something else

After you download everything, find your Federal Information Worksheet (note you may find this worksheet several pages in). Please see the screenshot below "Federal Information Worksheet" so you can more easily recognize the heading of this form in your file.

On page 2 of the Federal Information Worksheet, you may find the account information in Section V. Please see the screenshot "Account Info for Debit" below for an example.