You should attach all VA schedules and your Forms W2, 1099 and VK-1 showing Virginia withholding to your Form VA760 when mailing your return.
The mailing address for your return is based on the county that you live in and can be found on Page 43 of the Form VA 760 instructions here: https://tax.virginia.gov/sites/default/files/vatax-pdf/2018-form-760-instructions.pdf.
