How Dazller Cosmetics Fixed Their GST Reports, Discount Calculations, and Invoice Format Across Two Shopify Stores

About the Brand

Dazller Cosmetics is the modern consumer brand under Aravind Laboratories (House of Eyetex) a family owned Indian beauty company with roots going back to 1938.

They operate two Shopify stores: Dazller (their flagship makeup brand spanning eyes, face, lips, and nails) and Eyetex (the original brand the company was built on). Same owner, same team which means any configuration change made for one store needs to work perfectly for both.

They've been using GST Pro since June 2023 for invoicing, e-invoicing, and monthly GSTR-1 reporting.

For a business managing two storefronts, running regular B2B and B2C orders, and filing GST every month even small errors become real problems. Over time, three separate issues had stacked up. None of them were dramatic. All of them needed fixing.

The Three Problems

1. GST Reports Were Showing the Wrong Date

After the September 2025 GST slab revision, the Dazller team noticed something off in their reports. The new GST rate was being applied starting from 1st September 2025 but the correct effective date was 23rd September 2025. That's a 22-day gap.

For a business filing GSTR-1 every month, a date offset like this doesn't just look wrong, it can create real discrepancies when you're reconciling reports ahead of filing.

The fix was straightforward: go into GST Pro → Products → Slabs, update the rate change to reflect the correct date, and re-validate the report outputs. But knowing what to look for, and where, is what matters.

Inside GST Pro: Products are now split into "Current GST (After Sept 22, 2025)" and "GST (Before Sept 22, 2025)"  reflecting the correct effective date for the rate change.

You can read more about the September 2025 GST slab changes here →

2. A Free Product Offer Was Breaking Invoice Values

Dazller was running a promotional campaign offering a free Mini Glam Kit to customers. They ued a third-party Shopify app called EG Auto Add to Cart to add the product automatically.

The problem was in how the discount app was structured: it applied the ₹30 discount at the order level, not at the product level.

Here's what that meant in practice: the Mini Glam Kit was being charged at ₹30, then a ₹30 order-level discount was applied to cancel it out. The order total looked right. But inside the invoice, the discount wasn't being shown against the product as it was a blanket deduction on the whole order. This caused GST Pro to calculate incorrect taxable values, because the base numbers coming in weren't structured the way GST calculations expect.

What made this tricky: split order discount was enabled on their store, which meant the issue couldn't be fixed from the GST Pro side. The fix had to come from the discount app itself.

Once EG Auto Add to Cart corrected the logic to apply discounts at the product level, GST Pro automatically reflected the right values no changes needed on the GST side.

Worth knowing if you run similar campaigns: If your discount app applies free-product or bundle offers at the order level, your GST calculations downstream may be off even if your order totals look correct. The problem shows up in reports, but the fix is upstream.

3. The Invoice Format Didn't Match How They Worked

Working directly with the Dazller team, a tailored invoice format was designed and implemented across both storefronts. The final template included:

• Gross amount calculated as price × quantity
• A dedicated column for discount or coupon values
• A revised taxable value structure
• Consistent, clean formatting across Dazller and Eyetex

The goal was an invoice that a finance team member could pick up, review, and verify without having to reconstruct any numbers,audit-ready by default.

What They Use GST Pro For

Across both Dazller and Eyetex, the compliance workflow now runs on three core areas:

The Result

• GST reports now reflect the correct rate from the correct date no more 22-day offset from the September 2025 slab change
• The Mini Glam Kit campaign and other free-product offers calculate correctly in invoices and reports
• Both stores use a custom invoice format that matches how the finance team actually reviews numbers
• B2B and B2C orders flow through the same system without manual fixes between them

For a brand managing two storefronts and filing monthly, reducing the back-and-forth between stores and between tools adds up.

The Takeaway

The three issues Dazller faced aren't unique to them. A date offset after a GST slab update. A discount app that quietly sends wrong values downstream. An invoice that works but doesn't match how your team actually operates. These are patterns that show up for any Shopify business handling a decent volume of orders especially across multiple stores.

None of this required switching tools. It required configuring the existing system correctly, finding the root cause of each problem, and building an invoice designed around how Dazller actually works not a generic default.

Aravind Laboratories has been in the beauty industry since 1938. Their compliance infrastructure needs to keep pace with that legacy.

Running into GST report errors, discount calculation issues, or need a custom invoice format for your Shopify store?

Try GST Pro →  |  Read the documentation →