Update - we seem to have figured it out; use the search bar and search for "estimated taxes" - click "Go to estimated tax payments" and then the top button "Federal Estimated Taxes for 2018" even though you maybe don't have the "form 1040ES" - that's where you enter federal nanny taxes paid per quarter. For some reason we could only get the "Federal Estimated Taxes for 2018" if we used the search - if we tried to navigate to that page it was missing that section - so strange. Good luck!
