You didn't notice your checks were more? We have no way to know how much tax due you might owe. You can send in an extra amount to cover some. Or have extra taken out of your checks for the rest of the year. See how much they take out now for 1 check and multiply it by the checks you missed.
You can pay an estimate directly on the IRS website https://www.irs.gov/payments
Be sure to pick the right kind of payment and year.....2019 Estimate
