Here is how you can change the date while adding income in individual categories:
Step 1: Go to Bizli's Cashflow section from the bottom.
Step 2: Click on "Income" present at the bottom of the screen.
Step 3: Choose the category for which you want to change the date from the dropdown
Step 4: Enter the amount.
Step 5: Click on the date mentioned under the Note and choose the date of your choice.
Step 6: Click on "Ok".
Step 7: Click on "add Income".