How to create a custom template for bills payment?

I can see the convenience bill templates through your QuickBooks account, aziren. The option to import bill templates is currently unavailable in QuickBooks Online (QBO. Let me guide you accordingly.

We can look for a third-party application that manages bill templates in QuickBooks Online. If you need to use one, we suggest a third-party application and navigate for an app in the QuickBooks Online App Center. 

Here's how:

1. On the left pane, choose the Apps tab.
2. Click the Find Apps.
3. Enter the keyword or name in the Search bar.
4. Once done, similar apps will appear on the screen.

Moreover, exporting attachments using the Batch Action feature can be a helpful way to keep your attachments in QuickBooks Online. Please refer to this page mentioned for detailed instructions:

Export reports, lists, and other data from QuickBooks Online.

Please let me know what other specific features or requirements you have in mind for the file management application in QuickBooks Online, and I'll do my best to assist you in finding a suitable solution.