
Possible Solution:
This is an informational message informing you that both the "date of payment" and the "date of payment credit" should fall within the financial year.

Example :
You can observe in the following illustration that the assessment year selected is A/Y 2013-14 (F.Y. 2012-2013) and the first quarter (Apr to Jun). However, the "date of payment" and "date of payment credit" fall outside the financial year.
Here, the "date of payment" and "date of payment credit" should be between April 2012 and June 2012.