Except as otherwise provided by law, the amount of tax shall be assessed within three years after the return was filed, whether such return was filed on or after the date prescribed, and no proceeding in court without assessment shall be begun for the collection of such tax after the expiration of such period. A return of tax filed before the last day prescribed by law for the timely filing thereof shall be considered as filed on the last day. A return of recordation tax shall be considered as having been filed on the date of recordation. If no return is filed, the tax may be assessed within six years of the date such return was due. If a false or fraudulent return is filed with intent to evade the payment of tax, an assessment may be made at any time.
Upon such assessment, the Department of Taxation shall send a bill therefor to the taxpayer and the taxes, penalties, and interest shall be remitted to the Department of Taxation within 30 days from the date of such bill. Effective January 1, 2023, such bill and notice of assessment shall identify the date the initial return or payment was received by the Department, any payment amounts received, and an explanation of the taxes, penalties, and interest related to such assessment on such taxpayer. If such taxes, penalties, and interest are not paid within such 30 days, interest at the rate provided herein shall accrue thereon from the date of such assessment until payment.
As used in this section, "erroneous refund" means any refund of tax resulting solely from an error by the Department of Taxation that results in the taxpayer receiving a refund to which the taxpayer is not entitled.
Va. Code § 58.1-1812