Hi Bisra,
Welcome to Community! It's important that you're able to enjoy all of the features QuickBooks Desktop offers, and complete your daily tasks with peace of mind. I'd be glad to assist!
To ensure you're able to email your forms to your customers, I recommend updating your QuickBooks to the latest release. If you experience the same outcome, follow this link to fix data damage on your QuickBooks Desktop company file.
Should you require additional assistance, please don't hesitate to contact us. Your success is our number one goal and we'd love to help!