According to a written statment in Hansard, a number of clauses which had been intended for inclusion in Finance Bill 2015 have been deferred "as a result of discussions with the Opposition in the context of the end-of-Parliament wash up process". They are:

The government says that it intends that measures deferred to a future bill will be legislated at the earliest opportunity in the new parliament.

What's new? Budget 2015 at a glance

Source: Finance Bill 2015 Written Answers