CREATE + SIGN
CUSTOMERS
Invoice
Change the number on invoices and other sales forms
https://community.intuit.com/articles/1145900e
Account Summary on an invoice
https://community.intuit.com/articles/1146040-account-summary-on-an-invoice
Discount as line item on invoices and sales receipts
https://community.intuit.com/articles/1145568-import-products-and-services
Estimate
Progress invoicing for QuickBooks Online
https://community.intuit.com/articles/1659786-progress-invoicing-for-quickbooks-online
Converting an estimate into an invoice in QuickBooks Online (old before progress invoicing)
https://community.intuit.com/articles/1164873-converting-an-estimate-into-an-invoice-in-quickbooks-online
VENDORS
Online Bill Pay
Sign up for Online Bill Pay (powered by Bill.com)
https://community.intuit.com/articles/1625735-sign-up-for-online-bill-pay-powered-by-bill-com
Online Bill Pay – Settings Icon
https://community.intuit.com/articles/1583765-online-bill-pay-settings-icon
Online Bill Pay – Email preferences
https://community.intuit.com/articles/1516837-online-bill-pay-email-preferences
Print more than 14 lines in the voucher section of my check?
https://community.intuit.com/articles/1145988
EMPLOYEES
OTHER
MISC
Refunds for QuickBooks purchased at a Retail or Online Store (US only)
https://community.intuit.com/articles/1146144-refunds-for-quickbooks-purchased-at-a-retail-or-online-store-us-only
Recognize and report suspicious emails (Phishing)
https://community.intuit.com/articles/1145328-recognize-and-report-suspicious-emails-phishing
How and when can I contact Support? (US only)
https://community.intuit.com/articles/1145770
Contact Us on the website
https://help.quickbooks.intuit.com/en_US/contact
How do I clear the temporary Internet files and cache?
https://community.intuit.com/articles/1145697-how-do-i-clear-the-temporary-internet-files-and-cache
All QuickBooks Tutorials published by QuickBooks.
https://quickbooks.intuit.com/tutorials/all-quickbooks-tutorials/
QuickBooks Online International versions
https://community.intuit.com/articles/1145485-quickbooks-online-international-versions