You can make Direct Pay or EFTPS payments. You might want to bookmark this link:

https://www.irs.gov/payments

The e-filing shutdown and cutover schedule has yet to be announced. Bookmark this:

https://www.irs.gov/e-file-providers/modernized-e-file-mef-status

And watch here:

https://www.marketingexpress.irs.gov/systems-status/system-status-mef/modernized-efile-mef-operation...

Also, sign up for the e-newsletters for the topic(s) of interest to come directly to your email inbox:

https://www.irs.gov/newsroom/e-news-subscriptions

Now you will be the Second to know, right behind the IRS.