Hi, @dennis48. I'll share some insights about changing a credit charge to a debit charge in QuickBooks Self-Employed (QBSE).
If the transaction is manually entered, you can change the category corresponding to the debit charge entry, using the Schedule C categories as a reference. However, if the transaction is categorized through banking, you can modify the category to the appropriate one, as QuickBooks relies solely on the transactions received from the bank or those manually added.
While we're not able to provide which category to use for a specific transaction, you can refer to these articles for the list of categories that best fit your business needs:
Given all the information, I'd still recommend consulting an accountant to help and guide you on how to record these transactions. Your accountant can provide more expert advice in dealing with this concern. If you're not affiliated with one, you can visit our link to look for an accountant: Find a ProAdvisor.
Moreover, here are some articles that can guide you in your future tasks:
If you'd like to take care of some things like reports or categorizing other transactions in Self-Employed, let me know in the comments below and I'll ensure to address them accordingly.