ILR for Main applicant and dependant skilled worker visa extension query

Dependents Visa ending April 2025(need to extend till Dec 2026). I got my ILR yesterday. Got a few questions if any one can help me with please.

What should I give for the following:
1. Which visa or permission to stay has Main Applicant applied for or been granted? --- Skilled worker or ILR?
2. Do you have one of these Home Office reference numbers for Main Applicant?---- If its SWV should I give expired BRP details?
3. Do you know Main Applicant's visa end date? --- Is it SKV visa end ?
4. What is the end date of Main Applicant's visa? --- Is it SKV visa end ?
5. What is Main Applicant's work start date? --- Is it the Job I did with old SWV?
6. What is Main Applicant's work end date? --- Is it the Job I did with old SWV?
7. How do I specify the 1.5 years or 3 year(I heard I need to give 3 by default but not sure how)?

I gave Work start date as 15 April 2025(current SVW visa expiring on 14th April 2025) and End Date 15 April 2028 - but IHS is coming as 517 only. I dnt think the amount is correct.

any response would be appreciated.