Totally happy to help
1. Thank you for the pictures, especially having the ones with the squizzles
2. Its important to also paste your code, as the letters are small and trying to have to retype someones long code is too time consuming.
Can you pretty please paste the actual expressions as strings in a code block'
But type what you did
If(FormMode.New,(Table(First(Filter('ParkingRequests', 'ParkingRequests (Views)'.'Active Parking Requests Today',
Vehicle.Vehicle = cmbVehicle.Selected.Vehicle))), [Parent.Default])
You are NOT closing off the (Table you did) See here I'll break it down
If(FormMode.New,
( <== does not have a close anywhere Table(
First(
Filter('ParkingRequests', 'ParkingRequests (Views)'.'Active Parking Requests Today', Vehicle.Vehicle = cmbVehicle.Selected.Vehicle)
)
),
[Parent.Default]
)
because you have the extra ( before table
You would need
If(FormMode.New,(Table(First(Filter('ParkingRequests', 'ParkingRequests (Views)'.'Active Parking Requests Today',
Vehicle.Vehicle = cmbVehicle.Selected.Vehicle)))) <== add another ) here, [Parent.Default])