Welcome to the Community space, Eric.
Yes, you're legally required to issue a T4A slip to anyone (including your accountant or their firm) to whom your corporation paid more than $500 for services during the 2025 calendar year.
Please keep in mind that each T4A slip must be reported separately on your client's tax returns. This means that if your client receives more than one slip, each one must be accounted for individually on their income return. For more details on preparing and filing T4A slips, you can visit this site: Preparing and filing T4A slips for clients.
If you need guidance on how to prepare T4A slips in QuickBooks or file them with the Canada Revenue Agency (CRA), you can read this article: Using T4A forms in QuickBooks Online.
If you have any additional questions, feel free to revisit this thread.