How do I locate my tax forms that show the stimulus and child tax credits from last year

If you mean last year as 2020, the Child Tax Credit and the Recovery Rebate Credit are on the Form 1040 Lines 19 and 30, respectively.

Or for tax year 2021the CTC and RRC are on the Form 1040 Lines 28 and 30, respectively.

To access your current or prior year online tax returns sign onto the TurboTax website with the User ID you used to create the account - https://myturbotax.intuit.com/

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)

If you used the desktop CD/Download editions installed on your computer, the only copy of your tax data file and any PDF's will be on the computer where the return was created.  TurboTax does not store online any returns completed using the desktop editions.