You can go back to the self-employment expenses section of the program to see how you entered the travel expenses. Do not under any circumstances add, change or delete anything in the tax return that has been filed.
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/
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.
This will take you back to the 2020 online tax return.