Announced on January 15th:
Celebrating tap dancing as a uniquely American contribution to world dance, these five stamps feature photographs of different tap dancers performing against brightly colored backgrounds that highlight their form and movement. Art director Ethel Kessler designed the stamps with photographs by Matthew Murphy.
These stamps will be issued July 10th with a ceremony in New York City. The issue date had previously been reported as July 8th. 
Additional information will appear below the line, with the latest at the top
Updated August 2nd:
Here are the Scott catalogue numbers for this issue:
5609 Max Pollak (buff “TAP”)
a. Imperforate
5610 Michela Marino Lerman (rose “TAP”)
a. Imperforate
5611 Derick Grant (greenish blue “TAP”)
a. Imperforate
5612 Dormeshia Sumbry-Edwards (light blue “TAP”)
a. Imperforate
5613 Ayodele Casel (bister “TAP”)
a. Imperforate
b. Horiz. strip of 5, #5609-5613
c. Imperforate horiz. strip of 5, #5609a-5613a
Updated June 17th:
Here are the postmarks for this issue: 
The Digital Color Postmark measures 2.69″ x 1.25″ 
The B&W Pictorial Postmark measures 2.74″ x 1.31″
Updated June 3rd from the Postal Bulletin:
On July 10, 2021, in New York, NY, the United States Postal Service® will issue the Tap 
Dance stamps (Forever® priced at the First-Class Mail® rate) in five designs, in a pressure-sensitive adhesive (PSA) pane of 20 stamps (Item 480900). These stamps will go on sale nationwide July 10, 2021, and must not be sold or canceled before the first-day-of-issue. The Tap Dance commemorative pane of 20 stamps may not be split and the stamps may not be sold individually.
With these stamps, the Postal Service™ celebrates tap dancing as a uniquely American contribution to world dance. The five stamps each feature a photograph of a different tap dancer performing his or her craft against a brightly colored background that highlights the dancer’s form and movement. Art director Ethel Kessler designed the stamps with photographs by Matthew Murphy.
No automatic distribution.
How to Order the First-Day-of-Issue Postmark:
Customers have 120 days to obtain the first-day-of-issue postmark by mail. They may purchase new stamps at their local Post Office™ or at The Postal Store® website at 
usps.com/shop. They must affix the stamps to envelopes of their choice, address the envelopes (to themselves or others), and place them in a larger envelope addressed to:
FDOI – Tap Dance Stamps
USPS Stamp Fulfillment Services
8300 NE Underground Drive, Suite 300
Kansas City, MO 64144-9900
After applying the first-day-of-issue postmark, the Postal Service will return the envelopes through the mail. There is no charge for the postmark up to a quantity of 50. There is a 5-cent charge for each additional postmark over 50. All orders must be postmarked by November 10, 2021.
Technical Specifications:
Issue: Tap Dance Stamps
Item Number: 480900
Denomination & Type of Issue: First-Class Mail Forever
Format: Pane of 20 (5 designs)
Series: N/A
Issue Date & City: July 10, 2021, New York, NY 10199
Art Director: Ethel Kessler, Bethesda, MD
Designer: Ethel Kessler, Bethesda, MD
Photographer: Matthew Murphy, New York, NY
Modeler: Joseph Sheeran
Manufacturing Process: Offset
Printer: Ashton Potter (USA) Ltd (APU)
Press Type: Muller A76
Stamps per Pane: 20
Print Quantity: 18,000,000 stamps
Paper Type: Nonphosphored Type III, Block Tag
Adhesive Type: Pressure-sensitive
Colors: Black, Cyan, Magenta, Yellow, Custom Spot Grey
Stamp Orientation: Vertical
Image Area (w x h): 0.84 x 1.42 in. / 21.336 x 36.068 mm
Overall Size (w x h): 0.98 x 1.56 in. / 24.892 x 39.624 mm
Full Pane Size (w x h): 5.92 x 8.35 in. / 150.368 x 212.09 mm
Press Sheets Size (w x h): 11.84 x 25.30 in. / 300.736 x 642.62 mm
Plate Size: 240 stamps per revolution
Plate Number: “P” followed by four (4) single digits in two corners
Marginal Markings:
Front: Header: TAP • Plate number in bottom two corners
©2021 USPS • USPS logo • 2 barcodes (480900) • Plate position diagram (6) • Promotional text
Updated February 20th:
As reported below by VSC member Arthur von Reyn, “An article by Lisa Traiger in the February 18, 2021 issue of Dance Magazine indicates these stamps will be issued July 8, 2021, during the New York City Tap Festival.” You can read the article here.
The Tap Dancing stamp is ok. But it’s a slap in the face for the tap legends. Did they do their home work of Tap? What about Nicolas Brother, Bill “Bojangos” Robinson, Sandman Slim, Honi Coles, Baby Laurence, Sammy Davis, Jr. and so many others? The could have created a group of stamps with them. The second lady from the left and the lady on the left end danced at Hines stamp ceremony. The Stamp Advisory Committee should have done more research on Tap Dancing.
Are Any/All of these people Still Alive? I hope the USPS received Written Consent to use the images. ( Another Liberty in Lost Wages event for the Shysters… )
They are all alive; this is the rising generation who are clear that they stand on the shoulders of the artists that Clarence McKnight mentions. I happen to know that they knew about this photo shoot and are thrilled.
I’ll just leave this here…
https://about.usps.com/who/csac/#criteria
Read part 4.
From Post Bull June 3 #480904 Pn-20 Not on Auto-Distrib, Panes can be Split, you do NOT have to buy 20. PIC #16 and DCP #21 ( sets of 5 )
Still no word on Press Sheets, Cut or Uncut, for these stamps, or any other stamp(s) for the rest of the year. Has anyone heard anything about this?
The press sheets for the Tap Dance Issues will be both “with die-cuts” and “without die-cuts” according to the person I talked to in the USPS Stamp Fulfillment Department. The press sheets will go on sale on July 12th since July 10th falls on a Saturday.
I Postal bulletin 22573 dtd June 3, 2021 says the pane of 20 stamps MAY NOT BE SPLIT and MAY NOT BE SOLD individually. I confirmed this info with my local Postmaster who also showed me a copy of the bulletin..
Where did you get your info???????????
Lawrence, that notice is in almost every issue now, especially setenant design issues
Oh well, I could have missed it. From USA Philatelic 3rd Quarter 480906 Press Sheet $66.00 #08 Uncut Press sheet $66.00 I do not know what the Press Deadline for USA Philatelic is, the press sheets may be sold out by now…
The old stamp committee idea people have been replaced by three new ones. Hopefully they will do a better job of selection, not a biased one.
An article by Lisa Traiger in the February 18, 2021 issue of “Dance Magazine” indicates these stamps will be issued July 8, 2021, during the New York City Tap Festival. The dancers are real people, but not named due to USPS policy about showing living persons on stamps.
Thanks!
The people are not Irish. What are they doing on the US stamps dedicating to an Irish dance?
It’s tap dancing, not step dancing and how do you know they aren’t Irish? LOL