Getting into your Split Pay account should be quick. When it isn't, the articles below cover every common reason — login codes that don't arrive, sign-in methods that don't match what you remember, account lockouts, phone numbers that have changed, and email addresses you can no longer access.
If you're stuck on the sign-in screen, start with the most likely cause for your situation and work down from there. Most problems here are fixable in a couple of minutes once you know what's actually going on.