Frankly, I haven't figured out the Virginia site yet. It also requires a week's wait to get a PIN in the mail. Young clients tell me  the site is a bit daunting and the week's wait was annoying. My widower client is 91 years old. He's suspicious of online stuff.

Another client in NY used to pay estimated payments online for several years But something has gone awry and she can't get in for some unknown reason. We tried to start all over, but the message is that you already have an account. But how to get into it is our mystery. We ended up mailing the estimated payment via an extension voucher to NY. It looks like we will go back to mailing her estimated payments.

Perhaps I'm also old and impatient with online sites with their constantly changing password requirements. I've started instead to contact issuers of 1099Rs to change withholding to get rid of estimated payments. That has worked better.