Hi Fred,
If you select customer/supplier account then you can select on account payment/open items/ gl account etc.,
But if you select Tax Authority then the on account, open items reference fields are not valid but yes, G/L Account reference are valid.
But if you observe the payment allocation which got determined from the bank payment advice,
Payment Allocated To : This field is required which will help in creation of the Tax Payment in the Tax Management and this field is not supported in the Bank Payment Advice screen.
& this field will be enabled only when you select a Tax Authority under : Customer/Supplier ID field.
Even if the Allocation to G/L Accounts is provided in the Bank Payment Advice that will not help in creating a tax payment because of the missing field Payment Allocated To. I feel because of this the reason the screen itself left blank, also if we are selecting Bank Payment Advices then this activity itself says that we have some payments as reference, and we select tax authority then we need to make sure that it is posted as payment, and all payments created outside of tax management work center should be routed back to Tax Management woc > Tax Payments ( Externally initiated payment )
Thanks
Lokesh Sharma