When I'm trying to edit an invoice it says contact support, and recently it calculates my VAT totally wrong even though 20% is selected

Hello there, @charljohnson97. VAT calculation is essential as it will show you the amount your customer needs to pay. I'll share some troubleshooting steps and route you to our Support Team to address the message that says contact support when editing invoices.

Invoicing is part of daily transactions in a business. That's why the ability to edit and use the correct tax rate is essential.

Please know that there are various factors contributing to the tax calculation. It may involve city, county, or district rates. The state's specific economic nexus also affects it. In this case, I recommend contacting your accountant.

Moreover, ensure your customer's address is correct on each transaction. QuickBooks also knows how much tax you need to charge based on what exactly you're selling. Here's an article to learn more about this matter: Learn how QuickBooks Online calculates VAT.

However, if everything's correct, let's perform some troubleshooting to verify if it's a webpage issue. To start, access your QuickBooks account via an incognito or private window. This mode doesn't retain cache, so it's a good place to start. Here are the keyboard shortcuts you can use:

• For Firefox, press Ctrl + Shift + P
• For Chrome, press Ctrl + Shift + N
• For Safari, hold down Command + Shift + N

If it works, clear the browser's cache to start with a clean slate. You can also use other supported browsers as an alternative. Otherwise, reach out to our representatives. They will help you figure out why you're prompted to contact support. This way, we'll know what happened to your invoices and tax calculations. 

See this article for our operating hours: QuickBooks Online Support. It includes the schedule so you can call us at a time convenient to you.

I'm adding these resources that will guide you in personalizing sales forms and receiving customer payments:

• Customise invoices, estimates, and sales receipts in QuickBooks Online
• Record invoice payments in QuickBooks Online

Hope this goes well so you can get back into business soon enough. Let us know if you need more help with your invoices and VAT. We're available 24/7 to back you up. Stay safe and have a good one!