Thanks for reaching out to us here in the Community, gabemotta.
We don't recommend mixing personal and business funds, however, I can guide you on how to record this in QuickBooks Online Self-employed.
You can add this transaction and use a category for software. I'll show you how:
For more details about the business expense, refer to this article: Other business expenses.
I want to be your direct point of contact so we can get this taken care of so please let me know if you have any questions. Take care.