Please share which exam you are asking for as most of the engineering entrances will be announcing their application forms in the month of December tentatively.

You can check the details below-

1- JEE Main- First week of December (Tentative)

2- BITSAT- Last week of December (Tentative)

3- VITEEE- Second week of November (Tentative)

4- SRMJEEE- Fourth week of November (Tentative)

5- AEEE- 15/Nov/2017 to 31/Mar/2018

6- MUOET- First week of November (Tentative)

To check the details of all the exams you can refer below link

List of UG Egineering exams

Good Luck!!