Income from spiritual activities

good day,

my client earns income by performing spiritual activities and is about to apply for personal loan based on this income .my query is

1. is it correct to file in ITR3(presumptive income filing)  disclosing as (professional income)

2. after filing , is it necessary to get the auditor certified statement of income or the  ITRV along with the simple statement of income  without auditor sign & seal to the client is sufficient.

pls guide. tnx