Get your taxes done using TurboTax

For those looking for a solution to this limitation, you can use the Keyboard Manager in Microsoft PowerToys 

to map a key combination to the text you want to paste, and it will successfully paste a character at a time into the fields that TurboTax blocks from normal paste functions.  See example (not a real password) below where the Windows-Shift-P will paste the password.  It is reasonably quick to paste the passwords required in the same shortcut for each import.