Hi Kitty,
I have been doing estimated tax payments for 2 years. (retirement forced me to! I used to avoid it when I had a small business that only had income in Q4 by paying at the end of the year for the upcoming year)
EASY PEZY!
I have an account on IRS dot gov,
I think you can do it without one also, there is a link within IRS to a payment site
I set up for payments in advance.
It is very easy,
You can have them email you when a payment goes through.
keep your confirmation numbers!
