Amount of 2019 refund which was applied to 2020 taxes is not showing up as a credit in 2020 return

Our state of Wisconsin 2019 tax return had $450 of our overpaid amount to be applied to our 2020 tax. The amount is not showing up as a credit when calculating the 2020 tax refund amount. How do we make sure the $450 is added to our total refund? Thank you for your assistance.