Why I built offline QR invoices & 6-country tax inside Google Sheets

Hey everyone! 👋

Every solo founder, consultant, and small studio I talked to had the exact same back-office headache: paying $150–$250/mo across QuickBooks, a separate CRM, a task tracker, and an invoicing tool — only to export everything back into Google Sheets at tax time anyway.

At the same time, almost every Google Sheets invoice template breaks in real life for two reasons:
1. Using =IMAGE() APIs for payment QR codes triggers Google's scary yellow "trying to send data to external parties" warning banner.
2. You end up manually updating 15+ tabs until a formula breaks.

So for Sheetly Global OS (launching today!), I engineered two things under the hood:
• 100% local in-sheet QR generation triggered silently when you tick a print checkbox — embedding your Stripe/PayPal Scan-to-Pay QR on a clean PDF invoice with zero external API calls.
• A single Country Selector on Setup that rewires tax labels, Top 5 CPA write-offs, and a 25% tax reserve across US (IRS Schedule C), UK (HMRC VAT), Canada (GST/HST), Australia (BAS), EU VAT, and 0% Export — while you only ever type into 5 simple dropdown/checkbox tabs.

Curious how fellow builders and solo founders here run their invoicing + tax tracking today — do you stick with spreadsheets, Notion, or a dedicated accounting SaaS?