If you freelance or run a small business in India, you have probably paid for invoicing software that does one thing: multiply numbers and put them in a PDF. Today we will build that ourselves — a GST-compliant tax invoice generator that reads line items from a CSV and produces a clean PDF, in 87 lines of Python.
It handles the part everyone gets wrong: the CGST/SGST vs IGST split. Intra-state sales split the tax into equal CGST and SGST halves; inter-state sales charge a single IGST. Our script decides automatically by comparing the first two digits of the buyer's and seller's GSTINs (those digits are the state code).
What you'll need
One dependency:
pip install fpdf2
