Business Tools: guides & tutorials
Every CompressKits guide for Business Tools — free, practical, and tied to the tool that does the job.
About the Business Tools guides
This is the complete Business Tools section of the Learning Center: 2 guides, newest first, pitched at beginner level. Read end to end they run to roughly 12 minutes, though most people only need the one that matches the file in front of them.
Between them they answer the questions readers actually arrive with: Do invoice numbers have to be sequential? Can one document be both an invoice and a receipt?
Every guide here is tied to the tool that does the work — Invoice Generator and Receipt Generator — so you can stop reading and run the file at any point. Those tools are free, need no account and add no watermark to what they produce.
The newest guide in this section is What to Include on an Invoice: Checklist, last revised August 18, 2026. Each guide shows its own published and updated dates, so you can judge how current a number is before relying on it.