@sweerkaul , assuming that your 1099-div is from a US financial/brokerage there usually will be no adjustments to basis. Adjustment to basis is mostly used for cases where Tax Treaty dictates taxation rate of the income.
If your investment ( producing dividend and interest incomes) are being controlled by you and not through a US brokerage, then I need to know the country where your investment is to be able to investigate this further. Also I am assuming that you are a US person in 2020 ( i.e. US citizen/ Green Card / Resident for Tax Purposes).
