If a kmart.com coupon code isn't working, try these steps:
- Check the fine print for exclusions, expiration dates, or usage limits.
 - Switch browsers or devices to see if the code works elsewhere.
 - Disable browser extensions temporarily, as they might interfere.
 - Clear cookies and site data to refresh your browser.
 - Try incognito or private browsing mode.
 - Contact customer service for assistance.
 - Search for a new working promo code on coupon websites or forums.