Start with this as its own report:
SELECT *
FROM tblstate
That's the list of state values and their descriptive names. You'll see there that 1=Active, 2=Non-active, etc.
If you want to see only non-active assets, filter for tblAssetCustom.State=2.
If you'd prefer to filter using the descriptions, add the
tblState table to your report and make your filters something like
WHERE
tblState.Statename = 'Non-active'
Filtering on the tblAssetCustom.State value is more efficient (negligibly so, but still...) while filtering on tblState.Statename makes the query more legible. Pick your choose.