You can follow these steps:
Website:
Dashboard > Click on the 3 dots beside the goal you want to move funds out of > Click "Move Funds" > Select the funds you wish to move > Click Continue > Select the goal you want to move the funds to > Continue > Confirm.
You can do this any number of times.
App:
Home page → Mutual Funds (either from the center of the screen or from the bottom tab) > Click on the goal you want to move funds out of > Click "More" > Click "Move Funds" > Select the funds you wish to move > Click Continue > Select the goal you want to move the funds to > Continue > Confirm.
Important points to know:
1. There are no transactions (redemption or investment) involved in moving the funds from one goal to another. We simply move it (internally) from one goal to another. Therefore there will not be any charges or taxes involved.
2. Funds that have a SIP running in them can't be moved. You can stop the SIP in these funds, move it, and start fresh SIP in the goal you have moved the funds to.