Hello,
Let me answer your question please.
No, you cannot do this automatically in QuickBooks Online. QBO does not have an amortization feature built in. You can suggest this feature by going to the gear icon and clicking feedback.
Calculations of interest and principle would need to be done manually and then entered into QBO.
Here is the article on how to do the manual transactions but the short answer to your question is "No, QuickBooks Online cannot do this automatically."
