If the income certificate is issued a few days after the EWS certificate, but both are related to the same financial year and the EWS certificate is valid on the crucial date (like the application deadline or counseling date), it's generally okay. The income certificate may be issued later as it takes time for authorities to process the income verification.

Recommendation:

Check the validity period:

Verify the validity period of your EWS certificate, as it might vary by state.

Consider a renewal:

If the EWS certificate is nearing its expiration date, it's advisable to get it renewed to ensure it's valid on the crucial date.

Keep records:

Keep copies of both the EWS certificate and the income certificate for future reference.