Thank you for the suggestion to use a dummy US phone number to create a Turbotax account.
I did this and proceeded to take an hour or two and prepare my 1040 online.
Unfortunately the Turbotax payment system is also flawed as it insisted on a US format phone number to pay Turbotax. Putting in a dummy number simply doesn’t work, my credit card is registered to my UK address and they weren’t fooled by a dummy number.
So I’m no further forward.
