Va. Code Ann. § 58.1-352

The commissioner of the revenue shall prepare a memorandum assessment if the taxpayer, on filing his return, desires to pay in currency. Such memorandum shall be prepared on a form to be prescribed and furnished by the Department and a copy of such memorandum assessment shall be immediately certified to the treasurer, who shall receive the currency or coin from the taxpayer and give his receipt therefor. Memorandum assessments shall be subsequently entered by the commissioner of the revenue on the prescribed assessment sheets or forms, and the Department may prescribe and furnish forms for making memorandum assessments in all additional cases in which, in the opinion of the Department, the same may be necessary to facilitate the assessment and collection of individual and fiduciary income taxes.