Multiple 1099-G forms, how and what do i enter?

I received my normal 1099-G on "Refund for Tax Year: 2018"
along with 3 more 1099-G forms, on account of filing 3 amended State tax returns I submitted last year. 1 for "Refund for Tax Year: 2017", 1 for "Refund for Tax Year: 2016" and another for "Refund for Tax Year: 2014".
My question is; How do I enter the information in TurboTax 2019 in the field(s) that are for "Total of all your payments and withholding", for each tax year? This help is of almost no help at all regarding this. Thanks for any and all help.