How to conversions without a thank you page

How to conversions without a thank you page

Hi,
How can I track conversions with GTM without using a thank you page?
I cannot use a thank you page since the form submission triggers a download.

I just cannot find the right documentation.

This page shows an old tutorial with the old version of Google Analytics : https://www.zoho.com/forms/help/share/google-tag-manager.html#Pre-requisites

This page says it works with GA4 but forces the use of a thank you page.
https://www.zoho.com/forms/help/settings/acknowledgement-and-redirects.html#Tracking

Please let me know.
Thank you.