1) In Yardi Lease charge screen you can create a negative charge for a required time period:
i.e. you want a parking discount for next month.
2) In your system, you can run Update from Yardi for the lease in question and see that it is created as a feature:
3) When you create an Auto Pay this negative charge is added and can be saved. First please ensure that your Autopay Policy is set up as shown below:
Once the policy settings are set correctly, you will be able to save the negative charge as discussed above.