Sales tax, VAT and GST. Add or remove sales tax, VAT or GST exactly, with current rates for every US state, Canadian province and 38 countries.
https://plugins-worker.demos.42a.ai/sales-tax/mcpSettings → Security and login → Developer mode → chatgpt.com/plugins → + → paste the URL. After a tool change: Refresh, then a new chat.
| Prompt | Tool | Expected |
|---|---|---|
| What is the sales tax on $129.99 in Texas? | calculate_sales_tax | Texas state rate 6.25%: $8.12 tax, $138.11 total, with a note that local taxes average 1.95% (about $10.66 at 8.2% combined). |
| How much VAT is included in €59.90 in Germany? | calculate_sales_tax | €59.90 includes €9.56 VAT at 19%; the price before tax is €50.34. |
| I am buying a $250 bike in Montreal. How much tax? | calculate_sales_tax | GST 5% $12.50 + QST 9.975% $24.94 = $37.44 tax; total $287.44. |
| Add UK VAT: a laptop £899, two books at £24.99 (zero-rated), and a child car seat £150 at the 5% rate. | calculate_sales_tax | Net £1,098.98; VAT £179.80 + £0 + £7.50 = £187.30; total £1,286.28. |
| Compare sales tax on a $1,000 laptop in California, Texas, New York, Oregon, Ontario and the UK. | compare_tax_rates | Oregon $0; New York $40 (state only); Texas $62.50; California $72.50; Ontario HST $130; UK VAT $200. Lowest Oregon; US local taxes flagged. |
| How much federal income tax will I pay on $85,000? | none | Income tax is not sales tax. |
| Make an invoice with 8.875% sales tax for my client. | none | Making an invoice document is a different job. |
| Should I register for VAT as a freelancer in Germany? | none | A legal/registration question with no calculation. |