Greetings from Tangerang! I managed to get my ITAS converted to ITAP by myself with the very helpful advice provided by Atlantis. It took me 10 weeks from submission to get the ITAP. The process could have been faster but I was busy with family and did not have time to monitor it always.
Just want to point out a few things so others can hopefully jump through less hoops to get theirs converted.
1) After “field visit” is done, you should visit Kanim about a week later to follow up the status of your application and see if you are missing any documents and/or replies from other govt department.
2) After getting your recommendation letter from Kanwil, it is better to submit to Dit Jen Im (5th Floor, Rom 503) personally and make sure the electronic authorization from Kanim and Kanwil have been “clicked”. If not, Dit Jen will not process your application.
3) Dit Jen will tell you to come back in around 15 days time to collect your SK yourself. They are not going to send it. I tried to monitor the process by telephone but nobody ever answered.
4) Dit Jen will issue you 3 copies of the SK, one is for Kanim, one for yourself and one for Kanwil. There is no need to visit Kanwil. You can send it by courier. You can go straight to Kanim to pay, take photos, get fingerprinted, etc.