This is currently not possible with QB Self Employed. People have been requesting this for several years, but it has still not been added. 

It seems obvious that self employed businesses will need custom categories for their business accounts.

If anyone using QBSE would like this to be added please add your vote here: https://quickbooks.intuit.com/learn-support/quickbooks-idea-exchange/allow-users-of-qb-self-employed...

If the post gets 50 votes, apparently Quick books will 'consider' it. Please add your vote & hopefully something will be done to resolve this.