the analysis of residual is okay, the residual follows normal distribution and they are white noise. and the best model sarima that i've got SARIMA(2,1,3)(0,1,3) with s=3. can i do the forecasting then mister?

thank you for your reply

thank you Mr. Balazs,

if I may ask, do you ever read the references that talk about this before? if you do, can you let me know, because i read the book from Makridakis, they don't talk about this in their book

thank you for your help Mr. Balazs

i really appreciate it