Hey first of all TFC helps you in 2 ways:

1) On choosing a TFC centre nearest to you, you can verify all the documents. This selection of TFC Centre is must for document verification.

2) You can also obtain help from TFC Centre for online choice filling . This selection is not compulsory. You can do online choice filling by yourself in the home itself.

For more details refer

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