Sometimes QuickBooks point of sale features causes problems while opening the company files. To solve this issue read these instructions:
• Restart your computer.
• Open QuickBooks point of sale.
• Select the Test company file.
• Choose File > company operation.
• Select Restore from backup and click Next.
• Select browse the Alternate backup file.
• Click browse.
• Navigate to C:/users/public/publiv documents/intuit/QuickBooks POS/Data/Your company name/backup.
• Select the newest backup and click next.
• These will restore your data and it may solve your issue.
Else, you can call on the QuickBooks Point of Sale customer support number.
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