hi, unfortunately, quickbooks gave me new layout to use for about 2 days, i never switched back to the old layout because its was so easy to use new layout with the payment options on the right side and new much more professional estimate/invoice look, it would be insane if quickbooks would not figure out the way of how to let old customer to use new layout. i tried 4 different browsers ios and windows, tried incognito modes, cleared browsing history, cookies, cache, nothing helped, you press on switch layout button, it shows new layout for 3 seconds and then it goes back to the old layout again, its total glitch from quickbooks and i hope they will make new update ASAP.