Nvidia Corp.’s shares were tumbling in after-hours trading Tuesday, after the chip giant disclosed in a regulatory filing that it expects to include charges of up to $5.5 billion in its fiscal first quarter related to licensing of its chips to the Chinese market.

Nvidia on Tuesday said it would take $5.5 billion in charges after the U.S. government said it would require licenses for exports to China of its H20 microchip, which has been one of its most popular chips.

Nvidia Corp. said the US government will begin requiring a license to export the company’s H20 chips to China, an escalation of restrictions that the company has publicly opposed.