Visit a CSB Bank Branch:This is the most traditional way.
Locate your nearest CSB Bank branch using their branch locator https://www.cs.bank/.
Once at the branch, inform the representative that you want to open a "CSB Tax Savings Support" account.
You'll be provided a specific application form for this scheme.
Fill out the form with your details including name, address, contact information, PAN, nominee details, etc.
The minimum deposit amount is Rs. 100 (or multiples thereof) and the maximum is Rs. 1,50,000 per financial year to avail the full tax benefit under Section 80C.
Choose your deposit tenure, which is fixed at 5 years for the tax benefit. You cannot withdraw your money before maturity without losing the tax deduction.
Decide how you want to receive interest payouts (monthly, quarterly, or on maturity).
Submit the completed form along with the required documents and your deposit amount (cash or cheque).
The bank will verify your documents and provide you with an account opening confirmation.

Net Banking (for existing CSB Bank customers only):Check the CSB Bank website https://www.cs.bank/ for their Net Banking login and see if there's an option for Fixed Deposits or a similar section.
If an online FD option exists, look for "CSB Tax Savings Support" or a similar tax benefit scheme during the application process.
Some banks might require visiting a branch for verification even after initiating the application online.