First of all, it is the employer's responsibility to deduct the tax for the applicable employees and remit the same to the Income Tax Department. Anyhow, you have initiated it now. If you want to deduct income tax from the employees, you should first learn how to calculate the tax, understand the exemptions, and gather savings details from the employees. Generally, TDS is calculated by the finance department, and only occasionally do HR professionals calculate tax.
If there is a finance team, it is advisable to seek their help or consult the organization's auditor. If you still want to proceed on your own, you can reach out to me personally.
Regards