(Bloomberg) -- Treasury Secretary-designate Janet Yellen refrained from making specific pledges on boosting individual tax rates in responses to questions from U.S. senators, pledging only to work with lawmakers on the issue of whether households earning up to $400,000 a year would face increased levies under Biden administration proposals.In responses running more than 100 pages, Yellen, who awaits Senate approval for to the post, answered follow-up questions on a wide range of subjects from Senate Finance Committee members submitted after her confirmation hearing before the panel on Tuesday. The document was obtained by Bloomberg News.Topics spanned climate change to sanctions policy and moves to maintain the dollar’s status as the world’s main reserve currency. Following are some highlights from Yellen’s comments:Tax PolicyYellen promised to “work with members of Congress” on whether households earning less than $400,000 a year will be protected from any reversal of President Donald Trump’s 2017 tax cuts -- something Biden pledged on the campaign trailShe also dodged the question of whether a repeal of the cap on state and local tax deductions, as proposed by Biden, would deliver a big tax cut to wealthy Americans while doing next to nothing for those in the bottom half of income distributionShe was more direct in responding to criticism of Biden’s plan to reduce the threshold for the federal estate tax, saying “about the wealthiest six out of every thousand estates would face any tax” under the planTreasury-Fed coordinationYellen suggested that she won’t mount a fresh fight to revive several Federal Reserve lending facilities that were phased out by her predecessor. “The Federal Reserve will continue to provide support to the economy through its ongoing programs and the use of its available tools but as mandated by Congress, the 13(3) facilities funded by the Cares Act will not be available,” she wrote, referring to a section of the law governing the FedAt the same time, she said, “Right now, taking too little action poses the greatest risk to the health of our economy”China PolicyYellen reiterated that there will be no immediate lifting of tariffs on China and that the Biden administration will be monitoring China’s adherence to pledged made in the Trump administration’s “phase one” bilateral trade dealShe also repeated that the administration will use the “full array of tools” to counter China’s “abusive economic practices. The strategy will include working with allies to take on China’s “unfair” actionsYellen said that it’s important that aid from the IMF, World Bank and elsewhere to help countries around the world combat Covid-19 doesn’t end up going to repay Chinese loansMore broadly, Yellen said the U.S. needs to compete with China’s “economic statecraft” around the world and build partnerships distinguished from President Xi Jinping’s signature Belt and Road InitiativeForeign SanctionsYellen said the Treasury would “conduct a careful review of sanctions to ensure that they are targeted, effective, and minimize unintended consequences.” The Trump administration imposed a wide range of sanctions on companies, individuals and even oil tankers tied to Iran, North Korea, China, Venezuela and Russia -- often unilaterally.For more articles like this, please visit us at bloomberg.comSubscribe now to stay ahead with the most trusted business news source.©2021 Bloomberg L.P.