I appreciate you for sharing your concern here in the Community page, Jeremy. Know that I am here to support goals in QuickBooks Online. With that, I'd like to ask a few clarification regarding the issue you've encountered.
I would like to know if you are receiving any error messages on your screen. If so, may I ask for a screenshot? Additionally, can you specify which section in QuickBooks Online you are referring to regarding the missing end date field? This way, I can surely provide accurate solution to your query.
Furthermore, you'll want to save this resources that will help you move forward with your VAT payment task within QBO:
Know that we are still here to guide you and achieve you goal in QBO. Feel free to post your response in this thread. I'll wait for your response.
