For anyone still having this issue in 2026 I am on iOS and tried EVERYTHING I was finally able to get past step 2 and file by filling out everything on the turbo tax app then downloading Credit Karma and logging in there after that I deleted the TurboTax app from my phone and preceded to do the rest from the Credit Karma app. It redirected me from the app to TurboTax in a chrome window and from there I was able to complete step 2 and finally file my returns. Sorry it’s a mouthful but I hope it helps
