Ready for payment status for expense report when possible

We have a intermittent problem of resources submitting expense reports and the resource is termed.

As such when "Expense report import" is run the expense report gets rejected with reject code as "No home address".

What are the statuses and flow from

Resource submitting expense report in Self-Service

to

Stage before the expense report import is run

When does the status of the expense report change to "Ready for payment". Is it before running "Expense Report Import" but after Expense report approval?

.