1. Access the Configuration page and select Business Rules.
2. Click Gift Options, Activity Options
3. Mark the Receipt Amount checkbox under "when changing 'gift amount' automatically update.

If the Receipt Amount needs to be different than the Gift Amount and this business rule turned on, the Business Rule will apply regardless of the default values in the Gift Batch for the Receipt Amount. You must turn off the Business Rule in order to define a Receipt Amount that is different than the Gift Amount.