To register a private limited company in India, you need to follow these steps:

Obtain a Digital Signature Certificate (DSC) for the proposed directors of the company.

Obtain a Director Identification Number (DIN) for the proposed directors of the company.

Apply for a name availability of the company on the MCA (Ministry of Corporate Affairs) portal.

Prepare the Memorandum of Association (MoA) and Articles of Association (AoA) of the company.

File the incorporation documents with the Registrar of Companies (RoC).

Obtain a certificate of incorporation from the RoC.

Apply for a Permanent Account Number (PAN) and Tax Deduction and Collection Account Number (TAN) with the Income Tax Department.

Register for Goods and Services Tax (GST) if the annual turnover of the company exceeds the prescribed threshold.

The entire process of registering a private limited company in India can take anywhere between 15 to 30 days. It is advisable to seek the services of a professional company secretary or a chartered accountant to assist with the registration process.