A question about inversion ('should it' vs 'it should')

[Trungtran]

Please tell me which sentence is correct and why?

Only after food has been dried or canned, should it be stored for later consumption.

or

Only after food has been dried or canned, it should be stored for later consumption.

Thanks a lot!

[Yankee]

Your first sentence is correct.

You can read more about inversion here and also in various previous threads on this site:

position of 'very often' in a sentence
Expression requiring inversion: 'By no means, for example!'
Expression: "Only then was I able to understand the situation"