To transfer clients for the first time from 2019 to 2020....open 2020 Program - select from the top left :  File then Transfer from the dropdown menu        or    select Transfer icon from second row

The only reason to have an overwrite issue is if you have already transferred 2019 to 2020 and need to re-transfer.   If that is the case,  I would delete the 2020 files, then transfer.

Hope this helps

Delete the client file in 2020 so you can retransfer it from 2019 without needing to overwrite?

There used to be a checkbox somewhere to allow overwriting, not sure if Ive seen it in 2020 though.

Fixed by saving 2019 tax return with a new file name.  Now I am preparing 2020 tax return.

In the "options" under transfer, is a box to check to over ride existing client files