How do I enter a single coin into "MyCollection™"?
The easiest way to enter a single coin or a few coins into "MyCollection™" is as follows:

1. Log into heritagecoins.com
2. Click on "MyCollection™" under "MyHeritage".
3. On the left-hand side of the page, under "Actions", select the collection that you want to add a coin to, and click "Go".
4. You will see a Wizard Entry box at the top of the page. To enter coins one at a time, go to the selection that reads "By Date/Denomination" and click on the radio button next to it. If you want to add a 1921-D Walking Liberty Half Dollar in a PCGS MS-70 slab enter the date as 1921-D (the dash is required!), choose 50C for the denomination, choose "MS" to show that the coin is not a Proof, and click on the "Go" button in that section.
5. This will bring you to a page that allows you to select the grade and service of the coin. Choose "70" in the drop down box under Grade. Choose "PCGS" for the Grading Service. The final choice on this page is used if you have your collection divided into sub-categories; the default choices are "Coin Collection" and "Sold". Leave this drop down box at "Coin Collection". Your coin should already be checked in the selection box on the left of the table. Now hit "Add to Collection".

The MyCollection feature is known to conflict with certain firewall software. When this happens, MyCollection will sometimes show that no coins are available to add when it should give you a listing of available coins. If you see this behavior and have firewall software installed on your computer, you can either configure your software to trust HA.com, or you can temporarily disable such software while you add your coins.

MyCollection Overview
How to enter individual coins into MyCollection