Calculating Estimated Tax Payments for 2019 after 2018 was filed - amend it?

I already filed my 2018 return.  The estimated tax payments for 2019 were quite high and I wanted to revisit them since my income will be very different in 2019.  The only way I could get access to the worksheets was to proceed as if I were filing an amended return for 2018.  After determining that I don't need to make estimated tax payments for 2019, am I done?  Do I need to file an amended return?  (I printed out the "amended" return, but the 1040 - ES was not included, nor were my comments about why I chose a particular method from the valid choices for determining estimated tax).  I also can't get access to the worksheet that I filled in.  To make matters worse, TurboTax logged me out and it didn't seem to save the work I had done on the amended return.