First go to https://public.moe.gov.my/?kpm
go to Daftar Masuk to log in, No kad pengenalan is your IC or your spouse IC hope you still remember your password
 

This is after you log in successfully
Click Tahun 1 Pendaftaran Penyemakan Permohonan

After clicking Tahun 1 Pendaftaran Penyemakan Permohonan you will see this page
Click Semak Permohonan /Rekod Permohonan

After clicking  Semak Permohonan /Rekod Permohonan you will be able to see you child particular
click SEMAKAN
After clicking SEMAKAN this page will come out and you will be able to see the result
On the Sekolah Ditempatkan if it is the same school as what you registered your child and you agree, you click PENGESAHAN , CETAK SURAT and tarikh pengesahan will appear.

This is the confirmation letter
No need to pass the letter to the school, just wait for the confirmation and orientation letter from them.
You might still need to call and check with them if you are not comfortable.