the 2019 software will not be out probably until november (that's assuming no more major tax law changes)
if you used TT 2018 software, there is a section for estimating your 2019 taxes,.
generally to avoid underpayment penalties, you must timely pay in through withholding and estimated taxes
90% of current year tax or 100% (for high income taxpayers 110%) of prior year tax.
don't know when you started rideshare, but estimated tax payments are due 4/15, 6/15, 9/15 and 1/15 of following year. however, say you had no other income for 2019 and started rideshare in July 2019, no estimated payments would have been required on 4/15 and 6/15,
