Filing Appeal for rectification not corrected by CPC: u/s 154

Dear All,

For AY 2020-21, there is an error in the processing by CPC and after speaking with there call center, I filed 3-4 times rectification to reprocess and then once as return data correction. Unfortunately, the error continues and I am planning to file an appeal. As I populate the Form 35 application:

which date shall i enter for  "Date of service of Order / Notice of Demand / Date of payment?. The latest notice after rectification or initial. If I put the latest I am filing within 30 days.

What should be the "Income-tax Authority passing the order appealed against*. The site is giving default option as my AO. Is there a different code we should put in if it is CPC Bangalore.