New here! Deferred Revenue Schedule

Hello! Thank you for reading...

I am trying to make a deferred revenue schedule. I have 3 inputs. Start date, amount and deferral term. I would like the formula to calculate according to start date of contract, with the monthly amount over the deferral term. I can't seem to get it to cut off after the term amount...

I have attached my work so far... Thank you!

Please excuse me.. I am new to excel, so I am still learning.