Turbotax install fails on my Macbook, message says read only file

[suill]

I just purchased turbotax 2025 premier for Mac (MacOs Tahoe 26.1) & received the software activation key from Costco. I downloaded the .dmg file and moved it to my applications folder but when I try to open Turbotax from applications as the instructions state, I get a message that says" TurboTax is on a read-only volume.

TurboTax can't be updated when it's running from a read-only volume like a disk image or an optical drive. Move TurboTax to your Applications folder and relaunch it from there". I have used Turbotax since 2015 on my various Macbooks but this is the first time I'm getting a message like this. I have reinstalled it 3 times and also rebooted my Mac multiple times. Any help would be appreciated. Thank you. 

[Opus 17]

After you copy the program from the disk image to the applications folder on your hard drive, you have to drag the image (virtual disk) into the trash to unmount it.  The Mac is seeing 2 copies of the program (one on your hard drive and one on the virtual drive) and is trying to open the wrong copy.