I've tried several times to connect my bank account and everytime it doesn't connect anyone else having this problem im with halifax

I've checked our end and didn't find any reports of the same issue you stated above, @Lollypopfitness.

I'd appreciate it if you can provide the exact error message that you get when you connect Halifax to your QuickBooks Self-Employed (QBSE) company.

You can refer to this article for a list of the usual errors for open banking: Open Banking connection errors. 

To keep your bank balance up-to-date, you can follow the steps in the article to import bank transactions: Manually import transactions into QuickBooks Self-Employed.

I'll be looking forward to hearing back from you. Post a reply below if you have additional questions, and I'll get back to you.