saving the money to pay the taxes is one thing but since you would owe more than $1000 come filing time you should be paying quarterly estimate taxes form 1040-ES or using IRS website to avoid underpayment penalties. 1/4 of your annual tax bill needs to be paid in each quarter. that's generally 4/15/, 6/15, 9/15 and 1/15 of the following year. if the 15th is a weekend or federal holiday then the next business day. by now 50% of your estimated taxes should have been paid in.
the form
https://www.irs.gov/pub/irs-pdf/f1040es.pdf
the iRS website
https://www.irs.gov/payments
if you live in a state with personal income taxes, it to would likely have an estimated tax requirement.
