Hello! Would anyone be so kind to answer some of my questions? I would greatly appreciate it.
I'm applying for Subclass 189 as a 261313 - Software Engineer.
Is the employment reference below sufficient enough for my ACS application?

I was on an intra-company transferee visa so it was technically still the same company.
Do I still have to provide more details about my employment in Japan?
Since I'm still currently working at the same company is it okay to write DD/MM/YYYY - PRESENT? or is there a specific format for this?
I also have concerns for my payment evidences, I was employed from 2017-Present. I was able to get my Pay slips from 2018-Present. However, I am missing payslips from 2017 since it was on an older payroll system. For ITR I only have copies from 2020-2022. Will it be okay to supplement the missing months/years with an online screenshot from both my pagibig and sss contributions? Also how many payslips to I really need?
Lastly, is it okay to just DIY the ACS Skills Assessment Application or should I just look for an agent?