Yes, you can register for GST voluntarily even if your sales are below the ₨ 8 million.
Benefits include being able to issue tax invoices, claim input tax adjustments, and work with larger clients who require GST-registered suppliers.
It also enhances your business credibility and compliance profile.
Drawbacks include extra compliance costs, monthly/quarterly return filing, and the risk of audits.
Consider whether the benefits outweigh the administrative burden for your business size.