This happens because the new operating system eliminates the use of software keys in the registry settings, which leads to QuickBooks printer not activated error 20. This error appears on the screen when you are trying to print pay slips, forms or PDFs using QuickBooks Desktop. Along with this, there are many reasons and facts related to this error, which we will know in detail below. Read More: https://quickbetterbooks.com/quickbooks-printer-not-activated-error-20/