Dear Suchada,
After a review of the payroll service agreement with my Manager, we would like to request to delete all clauses and optional services which not apply. I have penned the changes in the scanned copy below.
Kindly review. I will be happy to have a phone discussion with you to go through the details.
I have also enclosed an updated Thailand Payroll process flowchart for your information.
Let me know when is a convenient time for us to go through this documents.