Solved
I found the option to round up to the nearest $100 for State and Local but I can't find it for Federal.
@lanstine wrote:
Thanks for your reply. I understand that I can manually adjust the figures. I was also searching for a way to make the change in the TurboTax Online system. It seems strange that the option to do so is available for state and local but not for federal?
See this TurboTax support FAQ for calculating federal estimated taxes - https://ttlc.intuit.com/community/tax-payments/help/can-turbotax-calculate-next-year-s-federal-estimated-taxes/00/26437
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