What is C3A Level at TCS and How much should I negotiate Salary for that Level?

I have recently been offered Architect/Tech Lead position at TCS. I did some research and found I might get C3A level. I will be working on AI ML Domain (Generative AI). How much salary Can I Negotiate for I am currently have 20 LPA salary (17 fixed). Any suggestions would be greatly appreciated. I don't know anyone working in TCS hence asking in this forum

TCS folks please Assemble and Help!!