Ah, self-employment is a whole different category and is tricky to get right. If there’s any way you can meet the financial requirement without using his income (I.e. if you are employed and earn at least £18,600 per year, or you have £62,500 in savings), that would be preferable over using self-employment, and in that case you just leave his employment details blank as if he does not work.
There are about 14 different documents he must provide for self-employment income and only the last full financial year of income can be used (for Cat F) or the last 2 full financial years (for Cat G).
Assuming his tax year is April to April, you will only be able to use income that he earned between April 6th 2018 and April 5th 2019 for Category F (or April 6th 2017 and April 5th 2019 for Cat G).
He needs to show that he earned a total of £18,600 between April 2018 and April 2019, before tax but after expenses, and he must provide things like HMRC registration documents, annual tax returns, invoices, bank statements, accounting documents, etc.
See page 60 onwards of Appendix FM 1.7 for how to qualify using Self-Employment income:
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/826340/Appendix-FM-1-7-Financial-Requirement-ext_1.pdfAnd see pages 64-65 for the list of all the documents he needs to provide for self-employment income
Sent from my iPhone using Tapatalk