Electronic mode for presumptive taxation payments expands 'bank account' to prescribed electronic methods, altering payment requirement. The proviso to sub section (1) of the presumptive taxation provision substitutes the phrase 'bank account' with 'bank account or through such other electronic mode as may be prescribed,' thereby recognising prescribed electronic payment channels as equivalent to bank account transactions for compliance under the provision and altering the operative payment mechanism for taxpayers in the presumptive scheme.