Hi. Can I have two different ABN's on the same app
Hi Shaz.
No you cannot unfortunately. Each ABN must be under its own separate account.
Can I make a separate account and use them both on the same app?
Yep that's fine to do Shaz.
One important thing to note though - you can only have one paid subscription for an app per Apple/Google account ie. if you're using the Premium plan ($9.99/month) on the Payroll App, it will only allow one of those per Apple/Google account.