revenue recognition adjustment manually

Summary:

We have subscription plan for 14 months, and we offer 2 months free plan where invoice creates 0 amount , However we would want to recognise revenue for 12 months without 0

I would like to understand if there is way we can achieve this

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Version (include the version you are using, if applicable):

25B, R13

Code Snippet (add any code snippets that support your topic, if applicable):