Let me help share information about the associated account a sales tax item or GST Payable in the item list.
When creating a sales tax item, the accumulated amount you owed and will be paid to the agency is posted in a default liability or payable account. Changing it is not possible. Learn more about this special account with this article: Understand the chart of accounts in QuickBooks.
Additionally, I've also included this helpful article for ideas about the limit of items you can create and the characters you can choose in naming them: Add, edit, and delete items.
If you have any other questions, please let me know in the comments or start a new thread. Stay safe always!