The largest tax overhaul since the 1980s cuts the corporate rate to 21 percent from 35 percent.

Following is a list of European companies impacted by the changes (in alphabetical order):

** Barclays (>> Barclays) expects to take a writedown of about 1 billion pounds ($1.34 billion) on the British bank's 2017 post-tax profit.

** BMW (>> Bayerische Motoren Werke) expects tax benefits to lift the German carmaker's 2017 net profit by between 950 million and 1.55 billion euros.

** BP (>> BP) will take a one-off, non-cash $1.5 billion charge in the energy company's fourth quarter 2017 earnings, although it expects the new tax rules to positively impact its U.S. earnings in the long run.

** Credit Suisse (>> Credit Suisse Group) expects to take a writedown of 2.3 billion Swiss francs ($2.3 billion) during its fourth quarter after the U.S. tax changes.

** Daimler (>> Daimler) expects an income tax benefit of about 1.7 billion euros in the German carmaker's 2017 results.

** Iberdrola (>> Iberdrola) expects the changes to produce income of 1.2 billion euros ($1.4 billion) in 2017‍​, the Spanish utility said.

** Qiagen  (>> Qiagen) will take an extraordinary post-tax charge on net income of about $110-120 million in the fourth quarter related to deferred tax assets, revaluation of deferred tax liabilities and other tax provisions, the biotech company said.

** Royal Dutch Shell will incur a charge to earnings of $2 billion to $2.5 billion on the basis of its third-quarter statements, the energy company said, but added it expected the tax legislation to have a "favourable" impact on its operations in the future.

** UBS (>> UBS Group) expects a 2.8 billion Swiss franc ($2.88 billion) writedown in the fourth quarter because of the U.S. tax changes, newspaper SonntagsZeitung reported.

(Compiled by Anna Pruchnicka in Gdynia; editing by Jason Neely)