The phrase "are needed to return" is correct and usable in written English.
It can be used when indicating that something is required in order to go back to a previous state or location.
Example: "The documents are needed to return to the original agreement."
Alternatives: "are required to go back" or "are necessary to revert".
So, Gonzalez has no illusions about what is needed to return to the N.C.A.A. tournament.
If supplies are insufficient to offset the losses, pumps may be needed to return water from lower to upper levels.
No telling how long this will go on, but I will do whatever is needed to return to full physical activity.
The scope for doing so is much greater than many realise with, for example, Oxford Economics noting in 2014 that "none of the spending cuts planned beyond 2014-15 would be needed to return the deficit to pre-crisis levels".
But several days were needed to return to the initial situation, involving extra travel time and cost for several hundred of people.
Drought indices indicated that as of the end of water year 2016 when reservoirs were full, additional water supply and landscape replenishment of up to three average years of precipitation in some locations was needed to return to normal conditions.
For example, if a user is interested in QM calculations based on Configuration Interaction (CI) theory, a dictionary of all CI methods will be needed to return all the calculations of interest (e.g. CISD, CISD(T)).
It can be measured by determining the disutility which is generated through a change from the most preferred level to the least preferred level and by identifying the corresponding increase in healthy life years, or decrease in cost that is needed to return to the original level of utility.
"What is needed to return to the center?" you ask.
"[C]omprehensive postal legislation is needed to return the Postal Service to long-term financial stability," the agency said.
And incentives are needed to encourage mobile researchers to return home.
