You can pay an estimate now.
Here are the blank estimate forms and instructions for federal. You need to go to your state's website to get theirs.
https://www.irs.gov/pub/irs-pdf/f1040es.pdf
Or you can pay directly on the IRS website https://www.irs.gov/payments
Be sure to pick the right kind of payment and year.....2019 Estimate
The 1040ES quarterly estimates are due April 15, 2019, June 17, Sept 16 and Jan 15, 2020. Your state will also have their own estimate forms.