what catergory do i put my seiss grant into on quickbooks self-employed

Glad to have you here, FrankM1.

While we're unable to provide which category to use for a specific transaction like SEISS Grant, allow me to share a list of categories that you can choose from. 

For the list of categories that best fit for education or professional development, please refer to this article: Categorise transactions in QuickBooks Self-Employed.

Given all the information, I'd still recommend consulting an accountant to help and guide how to record these transactions. Your accountant can provide more expert advice in dealing with this concern.

If you need other references for tips on your future task with QBSE, you can check out these helpful links: 

• QuickBooks Self-Employed Overview.
• List of our articles.

The Community is always open if you have other questions about categorising transactions. I'll be around to help. Wishing you a great day ahead!