The payment option for paying taxes online through credit/debit card is provided through a vendor. The convenience fee is charged by the vendor and goes directly to them. They charge this fee for providing you this service. The government doesn't take anything from this fee.

Most of the time, payments are reflected on the next working day. Sometimes, it can be delayed if staff attention is required for processing. But if you choose the bill pay option of the bank then it will take up to seven days for reaching the Treasurer's office.