Final answer:
To correct a sale that a cashier incorrectly processed without a tax exemption, a post-sale adjustment is performed. This involves refunding the incorrect tax amount and reringing the sale as tax exempt.
Step-by-step explanation:
If a cashier fails to process a sale as tax exempt, the error can be corrected by performing a post-sale adjustment. This typically involves refunding the customer for the tax that was incorrectly charged and then re-ringing the sale with the appropriate tax exemption.
The exact process may vary depending on the store's policies and the point of sale (POS) system being used. In some cases, a manager or supervisor may need to authorize the correction. It's important to address the mistake promptly to ensure compliance with tax laws and maintain customer satisfaction.