when I try to re authorise the account the button to sign in to my account doesn't open up a sign in to my bank

Hi Kerrie5, thanks for joining the Community 

Please check your browser settings to ensure that pop-ups and redirects are enabled. 

To do this on Chrome, select the 3 dots in the corner of your browser. Select settings > privacy & security > site settings > pop-ups and redirects. Choose sites can send pop-ups and use redirects. 

On Edge, go to Settings and more at the top of your browser. Select Settings > Cookies and site permissions. Under All permissions, select Pop-ups and redirects.

After changing your browser settings, please fully close & re-open the browser before signing back into QuickBooks to connect the account.