Here's how you can do that: 


On the website:


On the app:


Dashboard → The goal in which you want to invest lumpsum → Invest → Invest Lumpsum → Fill up the amount, risk level, etc. → Review and Confirm Lumpsum.

If you wish to invest in the funds of your choice, refer to this FAQ 

If you wish to check by when your investment will get processed or reflect on your dashboard, you can refer to this FAQ.