Can I enter data on the actual form 1040sr

You are posting from online TurboTax.  You do not have direct access to forms with online.  Form mode is only available with the CD/download.

You can look at a preview of your Form 1040.

https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing

Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.

Are you switching to the online version?  Were you able to transfer from 2019 on your computer?  Here's some info.....

You will need to have the .tax2019 file on your computer.  If you used the Desktop program last year here’s How to transfer into the Online version, expand the blue link if you used the CD/download last year........

https://ttlc.intuit.com/community/entering-importing/help/how-do-i-transfer-last-year-s-return-into-turbotax-online/00/25953

If you already started an online return you will have to clear it and start over to transfer.  How to clear and start over

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-clear-and-start-over-in-turbotax-online/00/26444

If you used the Desktop program before you may not like the online version.  It has less features and no Forms Mode.  You can only do 1 return.  Your return is only saved online so be sure to save both the .tax2020 data file and the pdf file to your computer when you are done.  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.