As a first step in reviewing the forms and documentation take a look at the UKVI webpage - Apply to join family living permanently in the UK
Take a look at the application form details here - Application for UK visa for family settlement: form VAF4A then ask any specific questions.
Each applicant needs to complete the form.
If you haven't already searched here in the forum look here to get some additional background info - How to apply for a spouse visa
TB screening is mandatory as is English Language test
All the detail can be found in the above links
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