I finished my returns but realized i need to add a dividend $, but it keeps wanting to me amend, i haven't mailed it in or send electronically

If you have not filed the return  ... here is the trick.  Log in and scroll down and click on ADD A STATE to let you back in to make changes.  

If you haven't efiled or mailed your return or it rejected you can go back in and change anything you want.  Do not click on Amend!

Click on Add a State to let you back into your return.

From Tax Home (the first screen you see after you sign in), scroll down to Your tax returns & documents. You may have to select Show to open the drop down.

Select 2021, and then select Add a State (you're not actually adding a state, this is just the workaround).

Then when you are ready to file you can try to switch to efile.

  https://ttlc.intuit.com/community/e-file/help/how-do-i-change-from-mail-to-e-file-in-turbotax-online/00/26985