I used the online version of turbo tax and need to access the program to see what details I entered for certain line items on schedule c. How do I get access to that?

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 2022 online tax return where you can review your entries.  Under no circumstance should add, delete or change Anything on the filed 2022 tax return.

Yes the Online is different than the Desktop program.   So be very careful if you go back through the Online version.  If you go back through some sections they will reset to the default answers and you need to answer them again.  

Before you start looking around in your return I would download both the PDF file with all the worksheets AND the .tax2022 data file.  You might want to install the Desktop program to open the .tax2022 file on your computer like the prior years.  If you paid for the Online version you can call in and ask for the Desktop download.  They might be nice and give you a copy.  It's good to download the files in case you need to amend in the future or if you need a copy to get a loan or something.  You might not be able to access your online return when you need a copy.  

Save the PDF

https://ttlc.intuit.com/community/saving/help/how-do-i-save-my-turbotax-online-return-as-a-pdf/00/26234

Save the tax file

https://ttlc.intuit.com/community/saving/help/how-do-i-save-my-turbotax-online-return-as-a-tax-data-file/00/25740