Dear sir I am using quick book software from last 3 months now quick book software is not allowing me to create any new invoices.
Welcome to the Community, @hireusfreelancer. Sometimes, your default browser holds too much cache and temporary internet files that causing QuickBooks to behave unexpectedly.
To confirm, log in to Quickbooks using a private or incognito window by opening any regular browser, then follow these shortcut keys below:
Chrome simply press Ctrl + Shift + N.
Mozilla Firefox and Internet Explorer, press Ctrl + Shift + P.
Safari, press Command + Shift + N. Make sure you're using the latest version.
If you're able to create an invoice successfully, that means you're experiencing a browser-related issue that can be resolved by doing a few basic troubleshooting steps. I'd suggest you follow the steps toclear your browsing data. Otherwise, try using another supported, up-to-date browser.
Let me know if there's anything else that you need help with. We're always delighted to provide our utmost assistance.