To absorb or split ACH fees with a single tenant, visit the 'Properties' tab on your landlord dashboard. Find the property you’d like to edit and click ‘Options’. Click the bubble next to 'Absorb fees'. From here you can enter the percentage of fees you would like to absorb for this property only. Click 'Save Percent' when you're finished. 

Dashboard > Properties > Options > Absorb Fees > Save Percent