Hi Meena
The following steps need to be followed for APP : --
1. Setup payment method per country
2. Setup payment method per company code
3. Setup all company codes
4. Setup paying company code
5. Bank determination
6. Assign payment method to vendor account
Once you are done with these steps, assuming you have done these as mentioned above and also completed the last step ( Vendor Master Record should be updated with the payment method, For this, go to transaction 'FK02'/ZK02, specify your vendor's name, company code, check payment transaction
check box and click enter).
Once these preliminary settings are done , you need an ABAper to create the smart forms.Some companies may even prefer to use PWB for this purpose.
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Thanks
Deeps