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Notes on intelligent software.

Practical guides on AI assistants, GST invoicing, and shipping software that works — from the team building NOXA.

E-BillRGST & Invoicing

HSN and SAC codes on invoices: a freelancer's cheat sheet

Every GST invoice line needs a code that says what you sold. For services that's the SAC — here's how to find yours and stop looking it up.

4 min read
E-BillRTax & Compliance

e-Invoicing in India: does it apply to freelancers?

e-Invoicing sounds intimidating, but most freelancers are well under the turnover threshold. Here's what it is, who it covers, and what to do now.

4 min read
E-BillRReports

Reading your P&L: a freelancer's guide to profit and loss

Revenue isn't profit. A profit-and-loss statement shows what you actually kept — here's how to read one and use it to run your freelance business.

4 min read
E-BillRGST & Invoicing

GST invoicing for freelancers in India: a no-jargon guide

When you need GST registration, what a compliant invoice must contain, and how to raise one in minutes without an accountant or a spreadsheet.

5 min read
E-BillRExpenses

Track business expenses the right way (and claim more)

Untracked expenses are lost deductions and lost ITC. Here's a simple system for logging spend as it happens — category, GST, and receipt included.

4 min read
E-BillRMoney Out

Managing vendor bills and due dates without the stress

Money you owe is as important as money you're owed. Here's how to track vendor bills, hit due dates, and never get surprised by an overdue payable.

3 min read
E-BillRGST & Invoicing

CGST, SGST or IGST: which GST goes on your invoice?

The tax split comes down to one idea — place of supply. Here's how to decide between CGST+SGST and IGST every time, including for exports.

4 min read
E-BillRInvoicing

Why your invoices should be immutable (and what that protects)

An invoice is a legal record of a moment in time. If editing your profile silently rewrites old invoices, you have a problem. Here's why immutability matters.

4 min read
E-BillRTax & Compliance

Input Tax Credit (ITC), explained for solo consultants

ITC lets you subtract the GST you paid on business expenses from the GST you owe. Here's what qualifies, what doesn't, and how to track it.

5 min read
E-BillRInvoicing

Build a reusable items catalog and invoice in seconds

If you retype the same services on every invoice, you're wasting time and inviting errors. A saved items catalog makes billing nearly instant.

3 min read
E-BillRCash Flow

Stop chasing payments: invoice tracking that updates itself

Manual status spreadsheets rot the moment a client pays. Here's how self-updating invoice tracking keeps your cash-flow picture honest.

4 min read
E-BillRWhy E-BillR

Free invoicing vs per-invoice fees: do the math

“10 free invoices, then pay” adds up fast. Here's what per-invoice and locked-feature pricing really costs a freelancer — and why free can be genuinely free.

4 min read
E-BillRGetting Started

Set up your business identity: GSTIN, logo and signature

A professional invoice starts before the first line item. Set your business details, GSTIN, logo, and signature once and stamp them on everything.

3 min read
E-BillRGetting Paid

Cash, UPI, bank, cheque: track payments by mode

Knowing you got paid isn't enough — knowing how tells you where your money actually sits. Here's why tracking receipts by payment mode matters.

3 min read
NOXAPlatform

Agentic AI for small businesses: automation that actually ships

Forget the moonshots. The agentic AI that pays off for small teams is narrow, observable, and tied to one painful workflow. Here's how to start.

5 min read
NOXAEngineering

Build vs. buy: shipping AI features without drowning in glue code

The demo is easy; production is the hard part. A practical framework for deciding when to build an AI feature yourself and when to buy.

5 min read