This is usually a browser problem. Change your web browser or clear cache and cookies on your web browser.
To access your current or prior year online tax returns sign onto the TurboTax website with the userID you used to create the account - https://myturbotax.intuit.com/
I’m not having problems on the website I’m having problems with my turbo tax card app that I have on my phone it will not let me login.
That website is not provided by or supported by TurboTax.
It appears that the website has a problem. Unable to access - https://turbodebitcard.intuit.com/
Wait for about an hour and the techs for that website should get it back up and running.