Hi Anilaa,
SAP has provided a test report for creating BIT items based on the config.
I am currently away from system but you can search the report by this search parameter rfkk*sample.
There is a separate test report for uploading BIT file. You will find this report in the same package.
The details of this can be placed in AC245 - Convergent Invoicing.
Hope this helps. 
Cheers,
Rakesh..
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