Deferred Revenue Question

When financial modeling, how come deferred revenues don't create deferred tax assets?

From my understanding, deferred revenue is supposed to be taxed under tax accounting (i.e., you pay cash taxes on it because cash is received). So, how come when deferred revenue goes up, there isn't a deferred tax asset created to account for the difference between GAAP and cash tax?

Mainly thinking about this in the context of software LBOs.