Utilize the input text as a context reference, choose the right relationship between Deloitte and tax from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Deloitte real estate tax partner Phil Nicklin said the budget changes would hit buy-to-let landlords hard.

Answer: product_or_material_produced