Hello student as most of the institute are offering online classes so yes you can take online classes even after lockdown but as Allen is a third party portal we don't have enough information to provide you exact information.

I'll suggest you to try Careers360 knockout package for NEET,Specifically designed for droppers by top faculties.

Refer to the link mentioned below - https://www.google.com/search?q=Neet+knockout+package

You can take the classes right from your place.

Feel free to comment if you have any doubt

Good luck