QuickBooks Desktop will be locked out if not registered within a period of time,HAMZA420.
If your license is already registered, a registration file might have been damaged that's causing the issue. You can delete the said file to unlock and remove the error. Then, register the license afterward. Let me share these articles as your guide:
Beware to share your data publicly. No one will call you but scammers. Navigate to your Help menu and contact Support from there as mentioned by JenoP.
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