Filters for Caldera Forms Authorize.net subscriptions (eCheck and Credit Card) -- REQUIRES version 2.1.0 or later -- https://calderaforms.com/downloads/authorize-net-for-caldera-forms/

caldera-forms-auth-net-change-interval.php

<?php
/**
 * Change billing interval for Caldera Forms Authorize.net subscriptions
 *
 * @param \net\authorize\api\contract\v1\PaymentScheduleType\IntervalAType $type
 * @param Caldera_Forms_Processor_Get_Data $data_object
 * @param array $form
 */
add_filter( 'cf_auth_net_arb_interval', function( $interval, $data_object, $form ){

	$interval->setUnit(  'daily' );
	return $interval;
}, 10, 3 );

caldera-forms-auth-net-change-start.php

<?php
/**
 * Make Caldera Forms Authorize.net subscription start one week later
 *
 * @param \net\authorize\api\contract\v1\PaymentScheduleType $subscription
 * @param Caldera_Forms_Processor_Get_Data $data_object
 * @param array $form
 */
add_filter( 'cf_auth_net_arb_payment_schedule', function( $paymentSchedule, $data_object, $form ){
	//Update for your form ID
	if ( 'cf12332' === $form[ 'ID' ] ) {
		//You must pass a valid DateTime object!
		//See- http://php.net/manual/en/datetime.construct.php
		$paymentSchedule->setStartDate( new DateTime( date( "Y-m-d", strtotime( "+1 week" ) ) ) );
	}


	return $paymentSchedule;

}, 10, 3 );

cf_auth_net_ref_id.php

<?php
/**
 * Change the reference ID for a Caldera Forms subscription plan created with Authorize.net
 */
add_filter( 'cf_auth_net_ref_id', function( $refId, $form ){

	//make sure to change field value
	$field_id = 'fld_134';
	$value = Caldera_Forms::get_field_data( $field_id, $form  );
	if( ! empty( $value ) ){
		$refId = $value;
	}

	return $refId;
}, 10, 2 );