Hello there, cpd3020.

I appreciate you for sharing your thoughts with us.

It's always our aim to constantly improve QuickBooks and appreciates the help of users in bringing things like this to our attention. 

While the option to add phone numbers and aging statement at the bottom of an invoice is unavailable, we'll make sure to update this thread once we receive notification and progress about the availability of this format.

For now, you can visit our QuickBooks Blog to get the latest news about QuickBooks and what our Product Care Team is working on. From there we share recent happenings and future developments: https://quickbooks.intuit.com/blog/.​

Stay in touch with me if there's anything I can help. I'll be around in the Community to help you out.