You would need to download the PDF of your 2016 tax return to include all forms and worksheets. In the Federal Information Worksheet at the bottom of page 4 will be the self-selected PIN's that you selected for yourself and spouse (if applicable).
If you have filed your 2016 tax returns and they have been accepted, when you sign onto your online account and are on the Welcome Home screen, click on My TurboTax at the top of the screen. When you are on your 2016 Timeline, under the section for SOME THINGS YOU CAN DO, click on Download all forms and worksheets
