Hi there, adriansproplumbi.
Currently, QuickBooks is unable to show the full estimate amount as subtotal when it's set up to 75% due. The balance due will show 18000.
For now, I suggest running the Estimate & Progress Invoicing Summary by Customer report to see the original amount of estimate and the balance due to the total percentage.
1. Click Report at the left panel.
2. Select the search icon and choose Estimate & Progress Invoicing Summary by Customer.
3. Find the estimate you created. Then click it to expand the page. From there, you'll see the original amount of estimate and the 18000 as Invoiced subtotal and also the Remaining subtotal.
Please check this article how progress invoicing lets you split an estimate into as many invoices as you need and how its work in QBO: Set up and send progress invoices in QuickBooks Online.
Please know that you're always welcome to post if you have any other concerns. Wishing you and your business continued success.
