Do I have to enter the exact location each time I pay for municipal parking fees? For example if I'm in SS3 PJ, and paid for my parking there and then drive over to SS4 to do something else, do I then have to enter SS4 PJ in the app? Or is it unnecessary since I'm still in the MBBPJ area? Does the paid parking time (say for 2 hr) cover the entire municipality?

My understanding for PJ is cover same municipal.

For KL its different as different areas have different parking rates, eventhough under same DBKL

just give the app access to your location

it will auto update

I scrolled through MBPJ, MBSJ, MBSA and just found out that theres an option to click on Petaling Jaya/Subang Jaya/Shah Alam which is probably answers my OP question.

Not necessary to change area if under same local authority with extra parking time.