Hey Sahitya! According to the official website the submission of processing fees will start from  14th August that is today you can once refer to the official website for confirmation. AP ICET stands for Andhra Pradesh Integrated Common Entrance Test is conducted by Shri Venkateshwara University. 

apicet.nic.in

Dear aspirant, 

The payment of processing fee was supposed to start from today but the link has not generated yet. You can wait till the link is not generated. I'm providing you the link where the link for payment will generate and you have to pay the fee. Till then you should visit the website at some intervals of time for getting updates. Below is the link.

https://apicet.nic.in/Default.aspx

GOOD LUCK.