My husband is able to claim his commuting miles due to his job always being at a temporary site, expected to last less than year. Can he claim the parking expense too?

[brunnjan09]

The parking expense is almost impossible to escape in some of the areas he works.

[SweetieJean · Accepted solution]

He cannot claim commuting or parking expenses unless his temporary assignment is outside your metropolitan area, 

That is, the fact that it is a temporary job is irrelevant if he comes home every night.

https://ttlc.intuit.com/questions/1899669-can-i-deduct-commuting-expenses-like-gas-mileage-or-toll-f...

As an example, this case from several years ago is still valid:

https://www.claconnect.com/resources/articles/tax-court-nixes-deduction-for-travel-to-temporary-work...