USTR Inspector General Act of 2020 This bill requires the President to appoint an Inspector General of the Office of the U.S. Trade Representative (USTR), who shall conduct an audit of the process for excluding articles from certain duties with respect to articles imported from China. The required audit shall include an assessment of whether USTR officials (1) uniformly applied the criteria used to review a request for, or objection to, excluding such articles from duties; (2) met with any interested parties to discuss a request or objection while the request or objection was pending; and (3) at any time permitted the resubmission of a previously submitted request or objection after the submission deadline.