Job Change jfrom W2 to 1099 for 2020--Estimated Taxes

Beginning in January I took a new job. 2019 was W-2. 2020 is 1099. This is the first time I've done full-time 1099 work. I know I need to pay estimated taxes. We already filed our 2019 taxes. QuickBooks has given me an estimated taxes amount for 2020 (but it does not know any of my husband's and tax status; and I'm not sure if that even matters). Do I need to do an "amended 2019 tax form" to get an accurate picture of what to pay and so TurboTax will generate the Vouchers? Just want to do what is right and not sure how best to do it (and clearly missed it when going through TurboTax for our 2019 taxes). Thank you for your guidance/help.