Hello and welcome to the Community, debbie-hill
Thank you for notifying us of the issue you are experiencing with sending remittance in QuickBooks Online.
This behaviour has been reported to our tech team previously and will be revised during our planned modernisation of the page in the future.
In the meantime, please press F5 or refresh the page to continue using QuickBooks, (please note, the remittance does send as expected). If you have any further questions, please get back in touch.