How do I record a loan that was given to me back in Oct. 2018 to begin payments in March 2019?
Where did you record the receipt of the funds? It should have been as a liability account deposited to banking or used to directly buy stuff. The terms and when payments start have nothign to do with establishing your liability as of October 2018
Let me take the time to welcome you to the Quickbooks Family. I can point you in the right direction on how to record and pay the loan.
In addition to @john-pero's answer, I’ve laid out the steps on how to input the transaction in QuickBooks. You’ll have to create the liability account first to track the loan.
After setting up the account, you can now record the loan amount. Let me guide you how.
Once done, input the payment. I’ll walk you through the steps.
Here’s an article with detailed information and screenshots on how to manually track loans.
These steps should get you pointed you in the right direction recording a loan.
If you need further assistance with any of these steps, post a comment below. I'm always ready to help. Wishing you continued success.