Hi, third allotment list was out om 13th October and fourth allotment list was out on 17th October. Assuming that you asked me about TNEA Counselling. There are no dates mentioned about late registration and late fees. So, there is no late fees date extension. The dates might be extended by them but there is no late fees. Below is the link to an article that will help you with your engineering counselling. Hope this helps.

https://engineering.careers360.com/articles/tnea-counselling